She probably is related then.Calla (Callow was a small place most of the individuals that came from there were related or connected in some way.There are a couple of other places in Ireland with the name of Callow. My Ggreat grandfathers family were actually new to the area from Longford and originally from England.His father William Green had been a constable in Clifden shortly after an accident in 1848 Wm. retired to Calla. The O'Malleys were native to the area. Godfrey married Honor O'Malley in 1860 her father Festus Patrick mother Honor Mitten. My great grandmother Annie Josephine Green eb 1863 Calla came to the US in 1879 aboard the Adriatic to Boston MA. I have researched both in Clare and Galway my O'Rourkes are in Clare.Morrissey is a pretty common name there.