Save Gender Masculine Usage Finnish Pronounced Pron. /ˈilk.kɑ/ [key·simplify] Meaning & History From a Finnish surname, which is of unknown meaning. It is given in honour of Jaakko Ilkka (1550-1597), the leader of a peasant uprising against Swedish rule, known as the Cudgel War. Name DaysName Days? Finland: March 16 Categories derived from a surname, rebels, surnames, uncertain etymology