Gaillard \ga(i)-lla-rd\ as a boy's name is of Middle English origin, and the meaning of Gaillard is "brave, cheerful, spirited". Also the name of a 16th-century dance.
Gaillard has 3 variant forms: Gaillhard, Gaillardet and Galliard.
For more information, see also the related name Gaylord.
Baby names that sound like Gaillard are Gallard and Gayelord.