Morvan

From an old Breton name of uncertain meaning. According to Albert Deshayes, the first element is equivalent to Modern Breton meur "great" and the second element, an aspirated form of man, is cognate with Latin manus "hand, strength, power over"; alternatively, the first element may be Breton mor "sea", while the second element may mean "wise, sage" from the Indo-European root *men "to think" (or "mind, understanding, reason").