Derived from the region in Scotland called Moray seaboard settlement. A notable bearer of this surname was General James Murray (1721-1794), who was the first British Governor-General of Canada.
The town of Garryowen was named after the old Irish tune Garry Owen which was one of Lt. Col. George Armstrong Custer's favorite marching songs. Garry Owen is an old Irish quick-step that can be traced back to the 1800s. it is known to have been used by Irish regiments as a drinking song.
The Regimental Song Garryowen came informally into the Army between 1861 and 1866 as a quickstep, but its use was first documented in 1867 when Garryowen was adopted by the 7th US Cavalry Regiment as the official Air (tune) of the Regiment, and the historical nickname given to the 7th Cavalry Regiment and troopers.