My great-grandfather was John Joseph Kerwin. His wife's name was Annie and they lived on Derwent Street in Oldham. John fought in the FWW. They had a daughter, Elizabeth Ann, born around 1906 (my grandmother) but I do not know of any siblings. She married my grandfather, John Walsh and had several children. I am not certain, but I think John Joseph may have come from Ireland in the late 1890's. Do you think he may be related to your grandfather?