From the Irish surname, Gaelic Ó Riain ‘descendant of Rian’. Ryan is associated with the film actor Ryan O'Neal (b. 1941) and is one of several names of Celtic origin that have become very popular throughout the English-speaking world since the 1990s. It is also now well established in North America as a girl's name.
French: 1. from Old French mortier ‘mortar’, perhaps an occupational name for an alchemist or spicer, or perhaps derived from a house sign. 2. habitational name from various places in France and Belgium, called Mortiers, for example, in Aisne and Charente-Maritime in France, or Mortier, for example, in the Belgian province of Liège.