Scott Williams

(male) Although this was in use as a personal name both before and after the Norman Conquest, modern use in most cases almost certainly represents a transferred use of the surname. This originated as a byname for someone from Scotland or, within Scotland itself, for a member of the Gaelic-speaking people who originally came from Ireland. The given name is now often chosen by parents conscious of their Scottish ancestry and heritage, but it is also used more widely.

English (also very common in Wales): patronymic from William.