Andrew Lancaster, in the comments on the profile for Harold de Sudeley, says that the name Drake is a red flag for William FitzHarold Drake. Harold de Sudeley had 5 sons, only the first four are listed in a charter for Robert de Ewyas de Sudeley. I assume that William was the son of an unknown second wife or mistress, who may have been named Drake. The sons of Harold did not all take the name "Sudeley"--presumably because Harold divided his barony among his sons, they took different names to differentiate their records and branches... which could have been merely logistical rather than feudal.