First Source: Gibson is an English and Scottish surname. The name is a patronymic form of the common mediaeval personal name Gib, which is a short form of Gilbert. The name Gilbert was very popular in Great Britain in the Middle Ages. Variant forms of the surname include Gibsoun, Gipson, Gibbson, Gibbons, Gilson, Gibb, and Gibby amongst others.
The personal name Gilbert, which was introduced into England by followers of William the Conqueror after the Norman Invasion of 1066. The Norman name was originally found as Gislebert or Gillebert, and is composed of the Germanic elements Gisil, meaning "hostage" or "noble youth", and berht, meaning "bright" or "famous". Gilbert became a very popular given name in England during the Middle Ages