Blazon: Azure fretty argent, on a canton or a fleur-de-lis gules
I can’t quite establish a historical presence for Simon de Somery; there does seem to have been someone by that name who was a pastor of Clent and studied abroad for three years in 1274. It’s unclear whether he was related to the de Somerys of Dudley Castle, though they apparently bore or two lions passant azure (or with the tinctures swapped; a lot of this is unclear).
Arms of Alan la Zouche (1205-1270) and Ellen de Quincy (?-1296)
From p81 of Lacies Nobilitie by Sir John Ferne (1586)
Blazon: Per pale baron and femme gules thirteen bezants 4, 3, 3, 2, and 1 and a canton ermine and gules seven mascles conjoined or 3, 3, and 1
The la Zouche arms have virtually always involved some number of bezants, but how many depends greatly on the source. The most common is probably ten in pile or 4, 3, 2, and 1, but thirteen or fourteen also occur, and some authorities simply describe them as bezanté, or deliberately unspecified.
Ralph appears to have had possession of the manor and lordship of Stopham, which passed down through his family until his great-granddaughter Eva de Stopham married William de Echingham. After her death, ownership of the manor is unclear, but it did ultimately end up with the Arundel family in the early fifteenth century.
Blazon: Per quarterly I argent a lion rampant double-queued, armed, langued, and crowned or (Luxembourg); II azure between three fleurs-de-lis or a bendlet couped gules (Bourbon); III per pale, the first per quarterly i barry of eight gules and argent (Hungary ancien); ii azure seme des lis or, a label of three points gules (Naples); iii azure seme des lis or within a bordure gules (Anjou); iv azure a lion counter-rampant or crowned gules (Gueldre); the second per quarterly i argent a cross pate between four crosses or (Jerusalem); ii or four palets gules (Aragon); iii or a lion rampant sable, armed and langued gules (Juliers); iv azure seme des cross crosslets fitchy, two fish hauriant addorsed or (Bar); overall a label of three points gules, in the fess point an escutcheon or on a bend gules three alerions argent (Lorraine) (the entire quarter for Guise); IV gules a cross argent (Savoy); overall in the fess point an escutcheon azure, three dexter hands or surmounted by a canton chequy argent and the field (Poiter)
Count of Tresmes 1630-1648, duke of Tresmes 1648-1670 (1579-1670)
Blazon: Per quarterly I azure a bend* between two dragons rampant or (Baillet); II or on a chief gules an escutcheon of Montmorency, the first quarter charged with a molet of five points sable (Aunoy); III or a cross gules between sixteen alerions azure 4, 4, 4, and 4 (Montmorency); IV argent a chief gules surmounted by a lion rampant azure, armed and langued or (Vendôme ancien); overall an escutcheon azure, three dexter hands or surmounted by a canton chequy argent and the field (Poiter)