My G-G-Grandfather is Richard Organ born about 1815
Waterford, Ireland. Richard had a brother Daniel also born in Waterford.
1861 Bristol census shows the following:
Daniel, brother, widr, born Waterford, Ireland
My mother is an Organ and we live in Abbeyside Dungarvan Co Waterford
There are quite a few Organs around here with perhaps the most famous being Nellie Organ who died in the early part of the last century.She is affectionately known as little nellie of Holy God.She is currently the subject of a move for her beatification.A booklet is available on her life and I can obtain it for you if interested.She would undoubtedly be connected with your family.