Medieval variant of Mervyn, resulting from the regular Middle English change of -er- to -ar-. Modern use may represent a transferred use of the surname derived from this in the Middle Ages. It is popular in the United States, where it is associated in particular with the American singer Marvin Gaye (1939–84) and the boxer Marvin Hagler (b. 1954).
Spanish (Aragón) and French: regional name from Aragon, an independent kingdom from 1035 to 1479, which took its name from the river Aragón that arises in its northwestern corner. The river name is of obscure origin; it may be related to Basque (h)ara(n) ‘valley’. In Basque, Aragon is called Aragoa or Aragoi, which may mean ‘high valley’. See also Dragon, Deragon.