A matrilineal surname is a family name inherited from one's mother (and maternal grandmother, etc.) and this line of descent or "mother line" is called a matriline. In this article, the scientific term matrilineal surname appears in its easier or shorter form instead, matriname.[a]
This article aims to present what is known about these mother-line surnames, first as single surnames and then as part of double surnames. For clarity and brevity, exceptions such as adoption will be ignored, while clan names are handled in the matrilineality article.
The terms family name or surname are used interchangeably in this article—and similarly father-line or patrilineal, and mother-line or matrilineal.
Note that the term "maternal surname" might be confused with "matriname", but in patrilineal cultures the maternal surname is the mother's patriname. Note also that women inherit a surname from their mother as well as from their father, in some patrilineal cultures in the Family name article. Such patrilineal cultures would permit matrinames to co-exist with patrinames there, as follows:
Where matrinames exist, they are passed from mother to child along with mitochondrial DNA (mtDNA); similarly, where patrinames exist, they are passed from father to son along with Y-chromosome DNA (Y-DNA). Thus, even within a patrilineal culture, if any group of women sharing mtDNA (from their common mother-line ancestor) were to choose a surname and then hand it down to successive generations, by definition that surname would become a matrilineal surname or matriname within a patrilineal culture. The test of whether a particular surname is a matriname is to determine whether it is actually being handed down from mother to daughter (to daughter) in a matriline.
The usual lack of matrinames to hand down in patrilineal cultures makes traditional genealogy more difficult in the mother-line case than in the normal (father-line) case. After all, father-line surnames originated partly "to identify" individuals "clearly" and/or were adopted partly "for administrative reasons";[c] and these patrinames help now in searching for facts and documentation from centuries ago. Thus, patrinames are stable identity-surnames, surnames which identify an individual, whether now or in the past or future; and matrinames similarly are identity-surnames for women.
Relatively recently, in its 1979 "Convention on the Elimination of Discrimination Against Women," or CEDAW, the UN officially adopted a provision, item (g) of CEDAW's Article 16, to the effect that women and men, and specifically wife and husband, shall have the same rights to choose a "family name", as well as a "profession" and an "occupation". These three rights are just part of the document's long list of women's rights or gender equality rights which women need to have, the same as men need them. The United States has not yet ratified this UN Convention, or multilateral treaty, according to the CEDAW article.
Thus, in non-discriminating States, women may eventually gain the same right to their own matriname as men have traditionally had (within father-line cultures) to their own patriname. And similarly, within mother-line or matrilineal cultures, men may gain the right to their own patriname. In other words, the handing down of both matrinames and patrinames would co-exist within each culture in order to avoid discriminating against either women or men. (Note that some cultures have no surnames – but if a culture has surnames then in this regard a non-discriminating culture would be a both-lines [mother-line and father-line] or ambilineal culture.)
Actual use of a matriname would involve, first, invention or choice of a name by a group of women who share mtDNA (from their common matriline ancestor)  and then using it in their daughters' birth records (or birth certificates).
This use of the mother's matriname would be parallel to and symmetric with the normal use of the father's patriname in each new son's birth record. Note well, this is the above-mentioned "handing down of both" the matriname and the patriname.
It should be mentioned that the patriname is normally a single surname, like Smith or Jones, normally not a double surname like Smith-Jones or Smith Jones.[d] (The matriname and patriname examples used later in this article are all single surnames, for simplicity and clarity.) And, just as men normally do not change their patriname,[d] so also women would normally not change their matriname. Thus both identity-surnames should be equally stable over the generations.
Note that one's birth surname is one's legal surname, unless one changes the latter – such as in some purely patrilineal cultures where women traditionally change to their husband's patriname at marriage, as described in Married and maiden names and in Name change.
Here is a specific example to illustrate and summarize these concepts: the father and sons in a nuclear family have the very-familiar patriname Smith while the mother and daughters have the matriname Momline as their own (and thus equally stable) identity-surname.
This section has focused on the single surname, for simplicity and clarity, before covering the resulting double surname in the next section.
The four double surname possibilities which combine a matriname with a patriname (in either order, and with/without a hyphen) – and which thus provide the above-mentioned gender symmetry – are as follows: matriname patriname, matriname-patriname, patriname matriname, and patriname-matriname.
Note, these might be confused with the double surname systems used by some patrilineal cultures and presented in the article Family name.[e] And note well, the patrilineal surname or patriname, received from the mother in such patrilineal cultures, does not qualify as a matriname, as already discussed in the previous section.
Three of the four possibilities above are used together in the example below. Such double surnames were proposed in the book The Seven Daughters of Eve; and an actual case from England, with the family matriname Phythian, is thoroughly demonstrated and discussed in a "feature" article which is available online.
As a specific example of these double surnames, let the matrinames be Mamaname and Momline and let the patrinames be Smith and Jones. The mother (with birth double surname Momline-Jones, for example) and the father (with double birth surname Mamaname Smith as another example) both choose to keep their legal or birth double surnames unchanged throughout their lives, and agree somehow to give all of their daughters and sons the double birth surname, Smith Momline : The mother hands down the matriname part of her birth surname while, symmetrically, the father hands down the patriname part of his. All sons have the Y-DNA as well as the patriname Smith of their patriline, while all daughters have both the mtDNA and the matriname Momline of their matriline. (Note, most cultures do give all children in a family the same surname or family name, as in this example.)
Each person has only one identity-surname, which in this example is either Momline or Smith. Their identity-surname is stable throughout life, as discussed in the previous section,[d] and is always half of whatever double surname(s) they legally acquire throughout life, such as at birth and at marriage(s).
The family in this specific example could choose to handle its three coexisting legal surnames Momline-Jones, Mamaname Smith, and Smith Momline by all using just one family "usage name" in daily social life at school, with friends and extended family, etc., a concept presented and discussed in the article French name, in its subsection Changes of names. (Possible samples of this family's usage name might be: any one of its three coexisting double surnames; or one of its two single surnames Momline or Smith; or Momith or any other invented name.) (Single surname families can use such usage names too, with related discussion in this footnote.[f]) This family's three legal surnames, however, must be used in their respective members' own legal documents, and may also be used otherwise such as in the respective members' own professional/vocational lives.
Rather than keeping their own birth or legal surnames, the parents in this example might prefer, at marriage, to change their legal surnames to Smith Momline, the same as their children-to-be, so that their nuclear family would all share this one legal surname.
Of course one's own identity-surname (here, the matriname Momline or the patriname Smith) is always available as one's own usage name, such as in one's vocational life.
This double surname example should be compared with its single surname version at the end of the previous section.
An overall comparison: The gender-symmetric single surnames presented in the previous section have the advantage of being simpler and briefer, but if actually used alone, would give different surnames for two genders in a nuclear family. In contrast, all of the children in a nuclear family have the same double surname. Also, these double surnames do record (on legal documents) both matriname and patriname, with both identity-surnames later aiding each gender in genealogy work and other historical-record searching.
- Double surname
- Family name
- Gender equality
- List of matrilineal or matrilocal societies
- List of people who adopted matrilineal surnames
- Lucy Stone League, on the topic of identity-surnames
- Maiden and married names
- Patronymic surname
- Women's rights
- The word "matriname" was used in scientific literature for many years before Professor Sykes' 2001 book. The Reference  provides a 1992 example, parts of which are available for Wikipedia readers to readily see, via "Google books".
- Likewise, the word "patriname" has been used for many years in scientific literature, and also in family genealogy. For an online example, the Reference  gives complete access to a 1978 ethnography which uses patriname. Finally, examples showing the word patriname used in family genealogy work are too personal to link to, here in public Wikipedia, but can be seen by searching online for "patriname" (use the quotemarks, for best results, and look for Rootsweb or Genforum within the URL of a candidate item).
- For a more complete historical background, see Surname § History.
- By reading within the Family name article, one notices that the single-surname (or patriname) is indeed used as the identity-surname, such as Smith or Jones, and that the double-surname Smith-Jones is normally used as two patrinames. Similarly one notices that patrinames normally are not changed.
- But currently, as of 8 July 2013, Family name does not mention any cases where both patrilineal surnames (or patrinames) and matrilineal surnames (or matrinames) are used, for any culture.
- Not only this double-surname family, but also its single surname version at the end of the previous section might both somehow choose to use a single name as a usage name, whether Momline or Smith or Momith or any other invented single name. In principle, their (new) friends have no way of knowing whether either family's legal surnames are actually single or double surnames. With a usage name, the two versions would look exactly the same to everyone else –– except someone handling their legal documents.
- Sykes, Bryan (2001). The Seven Daughters of Eve. W.W. Norton. ISBN 0-393-02018-5; pp. 291-2. Professor Bryan Sykes uses "matriname", only, and states that women adding their own matriname to men's patriname (or "surname" as Sykes calls it) would really help in future genealogy work and historical-record searches. This effectively suggests the double surname presented in this article. Professor Sykes also states on p. 292 that a woman's matriname will be handed down with her mtDNA, the main topic of his book.
- Fernandez. James W. (1992). About "moradas vitales". Cultures 2 (from Academia de la Llingua Asturiana), p. 69. Here is the "Google book", using matriname.
- Isbell, Billie Jean (1978, 1985). To Defend Ourselves: Ecology and Ritual in an Andean Village. Waveland Press. ISBN 0881331732, Ch. 3, p. 79. Here is the complete book, from Cornell Univ. Get to Chapter 3 of the book, then do a search for patriname.
- linguistics.berkeley.edu (2004). "Naming practices". A PDF file with a section on "Chinese naming practices (Mak et al., 2003)". Archived at WebCite  on 1Apr11.
- An Zhimin (1988). Archaeological Research on Neolithic China. Current Anthropology, Vol. 29, No. 5 (Dec., 1988), pp. 753-759. See p. 755 and p. 758. The first few sentences are accessible online via JSTOR at , i.e., p.753.
- UN Convention, 1979. "Convention on the Elimination of Discrimination Against Women", or CEDAW. Archived at WebCite  on 1Apr11.
- Stannard, Una (1977). Mrs Man. San Francisco: Germainbooks. ISBN 0-914142-02-X; pp. 334-37.
- Sarah Louisa Phythian-Adams, 20Aug08. "In the Name of... Archived 2011-04-01 at WebCite", an TheFWord.org featured article by the author. (To find the family tree etc. of this pioneering matriname double-surname case, search the article for the word "proposal".) Archived at WebCite  on 1Apr11.
- Stannard 1977; pp. 334-37 on actual invented surnames and pp. 84-88 on double surnames.