Dillian Is An Old English Name That Means "idol" Or "god." Your Little One Will Be A Force To Be Reckoned With, Thanks To This Unusual Name. Dillian Has Latin Roots But Also Feels Like A Combination Of Lillian And Dillon, Transforming It Into A Way To Honor Two Special People In Your World. Although Dillian Was Traditionally Used As A Girls Name, British Boxer Dillian Whyte Shows Its Perfect As A Gender-neutral Moniker.