Gray \g-ray\ as a boy's name is of Old English origin, and the meaning of Gray is "gray-haired". Poet Thomas Gray. Gray has 2 variant forms: Graye and Grey. For more information, see also the related name Grayson. Baby names that sound like Gray are Croy, Gary, Garry, Garey, Geary, Gery and Gerry. View a list of the 14 names that reference Gray.