It is a male name of Celtic origin. It means "faithful".
ANOTHER ANSWER:
The Dillons came to Ireland at the time of the Anglo-Norman invasion. The name is not of Celtic origin.
The surname Larsen is Scandinavian in origin.
The surname Guillory is French in origin.
The surname Moran is Irish in origin.
This surname Bombardier is of French and Italian origin, the surname is mostly found in Canada.
Navarro is a surname of Spanish or Basque origin.
The surname Salum is believed to be Arabic in origin.
This surname Olsen is of Danish and Norweagian origin.
This american surname Cutshaw is of German origin, a variant of German surname Gottschall.
Dillon is a surname with several origins. From the Welsh Dillyn, handsome, gallant, brave, fine.
Deutsch is a surname of German origin. It means "German"
This rare surname Ambasana is an Indian surname, of unknown origin. Perhaps from a place name.
The surname Alvarez is Hispanic in origin. The Spanish surname Álvarez is from a patronymic form of the personal name Álvaro, which is of Germanic (Visigothic) origin.