Alpaida (also Alpaïde, Alpaide, Alphaida, Alpoïde, Elphide, Elfide, Chalpaida; ca. 654 – ca. 714) was a Frankish noblewoman who hailed from the Liège area. She became the mistress of Pippin of Herstal (635 or 640 – December 16, 714) and mother to two sons by him, Charles Martel (Charles the Hammer) (d. October 22, 741) and Childebrand (678–751).
- Wood, Ian (2004). "Genealogy defined by women: the Pippinids". In Leslie Brubaker. Gender in the Early Medieval World: East and West, 300-900. Julia M. H. Smith. Cambridge UP. p. 244ff. ISBN 9780521013277.
- Theuws, Frans (2001). "Maastricht as a centre of power". In Frans Theuws. Topographies of Power in the Early Middle Ages. Mayke B. de Jong, Carine van Rhijn. BRILL. pp. 190–91. ISBN 9789004117341. Retrieved 13 October 2015.
- Commire, Anne, ed. (2002). "Alphaida (c. 654–c. 714)". Women in World History: A Biographical Encyclopedia. Waterford, Connecticut: Yorkin Publications. ISBN 0-7876-4074-3. (Subscription required (help)).
- Fouracre, Paul. "Writings about Charles Martel", Law, Laity and Solidarities, (Susan Reynolds, ed.), Manchester University Press, 2001, ISBN 9780719058363, p. 23
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