Little rock or descendant of Cathalán
Callin is often considered a variant of the Irish name Callan, derived from the Gaelic 'Cathalán', meaning 'little battle'. It may also be linked to the Scottish surname MacAllin, meaning 'son of Allen', which relates to 'little rock'.
Fewer than 5 boys were named Callin in 2025.
US births per 5-year period, 1990–present (SSA data).
