Yes, have to agree is was O'Reilly to begin with. I also suffer the same problem going from O'Rielly, to Riley (Rielly) when the family moved from Ireland to Middlesborough, UK in 1871 and then changed again when their eldest son moved to Australia in 1860 to O'Rielly. I suspect the first change was perhaps to blend in a little easier as I know in Middlesborough there was a fair bit of complict amongst the English and the large numbers of "alien" Irish flooding in to work the Iron Works there. Think they were very interchangable...