Hi there, My mother's maiden name was Adcock, daughter of St John Adcock (killed in action May 1915 in France). His father was also St John Adcock (died ca 1901) and lived in Dublin Ireland. I cannot trace anything beyond that and I feel that maybe he came to Dublin from england. The first name of St John seems to have been important as I also have that as a christian name. Perhaps an Adcock married a St John? I did come across another St John Adcock living ca 1918 somewhere in England. he was requesting some information from a friend in Ireland, for a book he was writing.