My 3x great grandmother was Ann O'Gara (c. 1845-c.1920) of Killavil, Gurteen District. She married a Patrick Colleary of Coolaney. One of their son's, John Colleary (1866-1908) emigrated to New York c. 1888. There are descendants in New York and Florida. The 1901 Census of Ireland shows Ann living on the family farm in Killavil with her son Patrick who became an officer in the Royal Irish Constabulary and was killed in the line of duty in 1921. His descendants reside in California. The time frame would be right for Ann and Ellen to be sisters.