Hello JaneSims,
No I am not an Arigho! My GGF name was originally Quaradeghini which he shortened around 1880 to Deghini. Unfortunately he couldn't spell and the priests where he was married and who baptised his children couldn't spell his name either. You probably know this, but Ceppi & Arigho were in partnership together, for a period, as Picture Framers operating from 8 Wellington Quay. They also may have come to Ireland together as they were both Swiss and came from villages that were only 3 or 4 kilometres apart (near the Italian border)