Drain

* As an Irish surname, from Ó Dreáin (“descendant of Dreán”), probably from dreán (“wren, songbird”) (see Welsh dryw (“wren”)). * Also as an Irish surname, from Ó Druacháin; see Drohan. * As an English surname, occupational surname related to the noun drain. * Also as an English surname, spelling variant of Drane. * As a French surname, reduced from Derain, from Old French dererain (“the last”), nickname for the youngest son of a family; see derrière (“behind”).