Cullin is an uncommon given name of Irish origin, derived from the ancient Irish name "Cú Cuilinn." This name was borne by several early Irish kings and chieftains, including Cú Cuilinn himself, who was a king of Connacht in the 12th century. The name translates to "hound of Culann," with "Culann" being an ancient smith god from Irish mythology. Today, Cullin is rarely used as a given name, making it quite distinctive and unique.
The name Cullin experienced fluctuations in popularity over the years, with a notable peak between 1992 and 2002.