I can't help you with the Ibbotson name. With ref to the Ibbotson's of Yorkshire, I think you'll find the ref. of location reads Ecclesfield, Sheffield, Yorkshire, Eng. Ecclesfield being the smaller location, Sheffield being the city. Yorkshire the County. My father married Istly. Ada Ibbottson and I've not got nowhere in my search of the name, and I live in Yorkshire. Good luck with you research. Joan.