From the Dering Roll (c. 1270-1300)
Blazon: Or two bars azure within an orle of martlets gules
Thomas was the son of William Paynel and an anonymous daughter of William fitzWimund. The arms use the same charges and positioning, but different tinctures. This is almost certainly an early form of differencing (changing arms to distinguish between members of a family). In England, differencing would later evolve into a codified system, at least according to most heraldic writers (though it is not clear how closely their rules were followed in practice).