Updated June 9, 2019 Share: Boy name origins & meanings Old English : Happy spearScottish : Oak tree ford Boy name variations Adger Adar Agar Adair Family name origins & meanings English (mainly Essex) : variant of Alger.French : from an Old French personal name of Germanic origin, Adigari, equivalent to English Edgar.Danish : habitational name from any of several places called Ager, meaning ‘plowed land’.