FEEDBACK FROM LONG-TERM RESEARCHER:
Having seen your entries for members of the 'St. Maur' (allegedly 'Seymour') family, it is my duty to point out that the two better known dynasties are totally separate, with distinctly separate coats of arms and having entirely different evolutions and inheritance routes. Sir William Dugdale and Professor Round seem to be the only people who ever noticed these anomalies, apart from myself. Richard Harold St. Maur, published ANNALS OF THE SEYMOURS, in London,1902 (Trubner/Trench/Kegan/Paul - now Routledge), and managed to join all three dynasties together as THE "SEYMOURS" - impossible!!! He places Goscelin de Ste. Maure de Touraine and his wife Aramburge at the top of the pedigree of ALL the "SEYMOURS".
1) De Sancto Mauro (St. Maur - not Ste. Maure) argent, 2 chevrons gules, a label of 3 to 5 or more points, depending on which son is applicable. An unbelievably puissant Norman baronial family from long before 1066, from Lower Normandy. They include Knights Templars, one a Grand Master, Aymeric, who persuaded King John to sign the Magna Carta, another, Milo de St. Maur, was one of the 1215 Rebel Barons. They married into the Lovell, Long, De La Zouche families while the Seymours were just becoming known. They simply don't join up with the Seymours anywhere.
2) The Seymour dynasty, of Dukes of Somerset, gules a pair of wings, tips down, in lure or. The origins and the creation of their arms are 100% obscure, but they only emerge around the 1400s with any power through marriages into the Beauchamp and L'Estrourmy families. Yet, they were not baronial until after the Tudor wedding in the 1500s. The two dynasties themselves knew they were not related.
3) The Seigneurie de SaintE MaurE (i.e. De SanctA MaurA, female saint) de Touraine, argent, a fesse gules. Their involvement in British Military History is nil. They were in the entourage of the Comte d'Anjou before the year 1,000 AD and remained in France permanently for at least five generations, never venturing over the Channel, and very much part of the French Angevine and later royal courts. They're out of the question altogether, and should never even be considered as ancestors of the 'Seymours' or the 'St. Maurs'.
Finally, the later 'St. Maurs' in the family of the Twelfth Duke of Somerset, were only so named because the Eleventh Duke decided to rename the family 'St. Maur' in the mistaken belief that they were the extension of the original powerful 'De Sancto Mauro' dynasty started in Britain by the Conqueror's Chevalier Compagnon 'Wido de Sancto Mauro'. He was, of course, incorrect, but the new surname stuck, and that was that!!! Sorry to be the bearer of bad tidings; but I have been trying since the 1990s to correct these anomalies, mentioned in a book in 2010, that met with bad luck. Please see my website: http://www.sil4books.co.uk . I am the biographer of the Earl St. Maur (1835-1869), who happened to bring my Moroccan Grandfather to Britain in 1868. I started my research in 1979. Best wishes. Joe A A Silmon-Monerri, author of THE SECRET LIFE OF THE EARL ST. MAUR (1835-1869), which failed thanks to a scam publisher in America. Since 2012, when I terminated the contract, I split the work into three volumes, and I will shortly publish through a much more honest British concern. Volume one is A SECRET SON.