Although we probably should open new threads for different family names, could I just add a bit on the wife of William Wilford of Exeter who died in 1413?
If we start with Vivian's “Visitations of Devon” (1895) at
https://babel.hathitrust.org/cgi/pt?id=yale.39002002213917&view=1up&seq=9, on page 59 this records that
Margaret Cornu, daughter of Walter Cornu, married first Robert Cruwys and secondly William Wilford. With her first husband she had a son named William Cruwys. No mention of any Wilford children.
Page 256 confirms this, stating that Robert Cruwys, a gentleman alive in 1381, married
Margaret Cornu, daughter of Walter Cornu, who after his death married William Wilford. They had two sons: Thomas Cruwys, gentleman, and William Cruwys. Again, no mention of any Wilford children.
A different account on page 597 says that Elizabeth Pollard, daughter of Walter Pollard, of Way in the parish of St Giles in the Wood, and his wife Elizabeth Cornu, second daughter and co-heiress of William Cornu, of Horwood, married William Wilford. No mention of any Wilford children.
When we turn to the “History of Parliament” online (1993) (I've no access to the print version) at
https://historyofparliamentonline.org/volume/1386-1421/member/wilford-william-1413, it is quite explicit that between 1393 and 1400 William Wilford married
Margaret Cornu, widow of Robert Cruwys and daughter not of Walter Cornu but of Sir Robert Cornu, knight and MP, of Thornbury. It adds that this Sir Robert Cornu in 1385 was a retainer of Edward Courtenay, Earl of Devon, as was Robert Wilford, MP for Exeter and father of William. There is no mention of Elizabeth Pollard and the only Wilford children mentioned are Robert (named after both grandfathers!) and Elizabeth