Need Help

Hi my name is Rosemary and i have been tryng to find my great grandfather family

I know my great grandfather was born in new Zeland  in 1883 but apart from that i can't seem to trace

him further than that i do know  his parents or maybe grandparents went from Ireland to new zeland

my great grandfarher's name was Charles Henry Carroll  i have been told the ancestor that traveld from

Ireland to new zeland dropped the O that would have been infront of the name