Type Word Usage Old Welsh Meaning & History Old Welsh word meaning "strong" [1]. Related ItemsDetails Given Name DescendantsGriffin(English) Grifud(Old Welsh) Griffith, Gruffudd, Gruffydd, Gruffud(Welsh) Surname DescendantsGriffith, Griffiths(English) Griffin, Griffith, Griffiths(Welsh) Sources & References Matasović, Ranko. Etymological Dictionary of Proto-Celtic. Brill, 2009, page 224.