An early example of a lozenge shaped shield
William fought in the campaigns against the Scots, and was at Bannockburn in 1314.
He died in 1317, and was succeeded by his brother, John.
William appears in the St George's Roll, E189, where he bears
Argent two bars azure an orle of martlets gules
Thomas Paynell, died 1314, apears in St George's Roll, E203, & The Galloway Roll GA167, where he bears
Or two bars azure an orle of martlets gules
In the illustrations, I have not drawn martlets between the bars as they appear in the seal. The difference is not significant.
See also the page on John Paynel