Searching for Relatives of Daniel St John Gough Born Dublin City 1834

Our earliest known Gough ancestor was Daniel St. John Gough born Dublin city 1834. He was a Customs and Excise Officer. He served in Cloughjordan, Co, Tipperary, Birr, Co. Offaly and Clonmel, Co. Tipperary. His wife was Elizabeth Delaney from Stradbally, Co. Laois. We have all records after that. We would like to connect with descendants of his siblings, if possible. We understand that the eldest son in each generation was given the prefix St. John, before the name Gough. Does anyone have anything to tell us? Do get in touch.