'Three men appear at Trumpington in the late 15th c: William, Andrew and John. Through their wills and dealings, they establish themselves as brothers. It is hypothesized they are the sons of Richard Kylburn, listed as flourishing 1412-1434 and dead prior to 1454.'
↑ Birth year estimated based on the fact that he was "flourishing 1412-1434" and the hypothesis that William was his son.