From an Irish surname, the Anglicized form of
Ó Súileabháin, itself from the given name
Súileabhán, which was derived from Irish
súil "eye" and
dubh "dark, black" combined with a
diminutive suffix. This name has achieved a moderate level of popularity in France since the 1970s. In the United States it was rare before the 1990s, after which it began climbing steadily. A famous fictional bearer of the surname was James P. Sullivan from the animated movie
Monsters, Inc. (2001).