The Irish surname Moriarty is found in the southwest of the country primarily in county Kerry. The name Moriarty is an anglicized form of Gaelic name Ó Muircheartaigh meaning “descendant of Muircheartach.” Muircheartach is a personal name composed of the elements muir meaning “sea’” and ceardach meaning “skilled”, i.e. “skilled navigator.” Their territory lay on both sides of Castlemaine Harbour where they held great sway prior to the Anglo-Norman Invasion of 1170. Henry Augustus Moriarty (1815 - 1906) was true to his name, a renowned navigator who was highly acclaimed for his success in the recovery of first Atlantic telegraph cable which broke in mid-ocean in 1866. Today there are approximately 9,600 people with the last name Moriarty living in The United States.
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