Slevin is an unusual and distinctive given name of Irish origin, derived from the ancient Irish surname Ó Sléibhe. The name is believed to have been borne by a sept of O'Kelly, who were chiefs of County Galway in Connacht province during the medieval period. It is thought to mean "descendant of Sleibhe," which could refer to an old Irish personal name or perhaps a place name. While not particularly popular today, Slevin remains a unique choice for parents seeking an uncommon yet historical and meaningful name for their child.
"Slevin experienced a peak in popularity with 14 births in 2011, but has since seen a consistent decline, with 5 or fewer births annually from 2016 onwards."