When I look up this name in the IGI, Garrigan's and Gargan's also come up, and so I assume they are variations. I have had no real luck searching for my great grandmom "Catherine Anne Gargon" . She was born November, c. 1866, in Ireland, or was of Irish decent. She lived in Liverpool and was married to William Edmund Waters. Both died in Liverpool (1935-1941?). They lived at 4 Whiteford Street, W. Derby at least in 1901 when my Nan, Elsie Waters (later married Reg Smith) was born. Have any of you come across this name in your searches?