Type Word Usage Old Irish Meaning & History Old Irish word meaning "hostage" [1]. Related ItemsFamily Tree·Details Other Languages & Culturesgēstlos(Old Celtic) gwystyl(Old Welsh) Given Name DescendantsComhghall, Cowal(Irish) Comgal, Comgall(Old Irish) Sources & References Matasović, Ranko. Etymological Dictionary of Proto-Celtic. Brill, 2009, page 159.