Type Word Usage Old Celtic (Hypothetical) Meaning & History Celtic word meaning "rampart, hill fort, citadel" [1]. Related ItemsDetails Given Name DescendantsMerlin(Arthurian Romance) Marlin, Marlyn, Merlin, Merlyn(English) Myrddin(Welsh) Myrddin(Welsh Mythology) Surname DescendantsDowner, Leon, Lyon, Lyons(English) Léon, Lyon(French) Place Name DescendantsLugdunum(Ancient Roman) Moridunum(Brythonic) Lyon, Lyons(English) Lyon(French) Lugodunon(Gaulish) Lyon(German) Lione(Italian) Sources & References Matasović, Ranko. Etymological Dictionary of Proto-Celtic. Brill, 2009, page 108.