Mainly North American: transferred use of the surname, originally a Norman baronial name (d'Airelle) borne by a family who came from Airelle in Calvados. It was first used as a given name towards the end of the 19th century.
German and Jewish (Ashkenazic): from personal name Heinrich, composed of the Germanic elements haim, heim ‘home’ + rīc ‘power’. In the Middle Ages this was the most popular of personal names in Germany. See also Henry.