Launce \la(un)-ce\ as a boy's name is a variant of Lance (French). See for meaning of Launce.
The baby name Launce sounds like Lanzo, Lanza and Lenci. Other similar baby names are Chaunce, Lane, Layne, Laine, Lange, Lannie, Laurence, Laurance, Larance, Luce, Rance, Vance and Yance.