The Irish surname Hanifin is an anglicized form of the Gaelic name Ó hAinbhthín (modernized as Ó hAinifín) meaning “descendant of Ainbhthín,” a personal name derived from the Gaelic term ainbhíoth meaning “fury, or storm.” The name is most frequently found in the southwest of Ireland centered around county Kerry and the western parts of county Limerick. The name is first recorded in the United States in the mid 19th Century and is a rare name there today.