According to the research on this site: http://fabpedigree.com/s028/f501985.htm , which has a pretty good bibliography, Richard did indeed have a son, Edward - although the mother is unknown. A Robert Montague claiming descent from John Montacute married Elizabeth de Mohun through an illegitimate son named Edward and they had issue.LeValley 02:26, 7 May 2011 (UTC)
That site has no sources as to where the information came from. In fact it has no sources at all. William, the 2nd Earl of Salisbury married Elizabeth de Mohun as his second wife; daughter of John Mohun, 2nd Baron Mohun, by his wife Joan de Burghersh. Their son, William, had no issue and the 2nd Earl was succeeded by his nephew. From all three sources listed below, Edward had no issue [died d.s.p]. Therefore I am taking this information out.
George Edward Cokayne, The Complete Peerage of England, Scotland, Ireland, Great Britain, and the United Kingdom, Vol. XI, pg 393.
George Frederick Beltz., editor David Nash Ford. Memorials of the Most Noble Order of the Garter, 1841. Royal Berkshire History
John Burke. A general and heraldic dictionary of the peerages of England, Ireland, and Scotland, extinct, dormant, and in abeyance, 1831. pg 362. Google eBook -- Lady Meg (talk) 22:18, 13 April 2012 (UTC)
actually, there are extensive sources on Allen's citations page. There are, however, no footnotes. My copy of the Cokayne book has nothing about the Montagues on that page. There's only one edition, AFAIK, so that's not a source and should be removed. There's no page number for the Beltz citation, and no mention of Richard. I'll check the google book. — Preceding unsigned comment added by 220.127.116.11 (talk) 06:40, 14 October 2012 (UTC)
page 362. Of Burke only relates that Thomas's lands (but not titles) were conveyed to his daughter as dowry for her Neville marriage. It says absolutely nothing about what happened to Richard. — Preceding unsigned comment added by 18.104.22.168 (talk) 06:45, 14 October 2012 (UTC)