Don't know of any possible connection. The Martin Callahan I have has the following necrology: Id#: 0047027 Name: Callahan, Martin P. Date: Jan 8 1950 Source: Source unknown; Cleveland Necrology File, Reel #012. Notes: Callahan, Martin P., beloved husband of Catherine (nee Nice); father of Catherine Cooney, Mary Cummings, Thomas, Rita Pavlek, Margaret Sinclair, Martin jr., Rose Nupp and John and grandfather; brother of Dominick of Kearny, N. J., and James of San Diego, Cal.; at residence, 4619 Clinton Ave., Friday, Jan. 6, 1950. Friends may call at McGorray Bros. Lakewood Home, 14133 Detroit Ave. Funeral Monday, Jan. 9, St. Patrick's Church (Bridge Ave.) at 10:30 a. m. In the 1930 Census the family is indexed as follows: Enumeration district 110 67 Callahan Martin Head M W 40 Ohio 20B Cleveland City 8 27 68 Callahan Jennie Wife-H F W 35 Ohio 20B Cleveland City 8 27 69 Callahan Catharine Daughter F W 16 Ohio 20B Cleveland City 8 27 70 Callahan Mary Daughter F W 14 Ohio 20B Cleveland City 8 27 71 Callahan Thomas Son M W 13 Ohio 20B Cleveland City 8 27 72 Callahan Rita Daughter F W 8 Ohio 20B Cleveland City 8 27 73 Callahan Margaret Daughter F W 4 7/12 Ohio 20B Cleveland City 8 27 74 Callahan Martin Son M W 2 10/12 Ohio 20B Cleveland City 8 27 Martin Callahan Married Catherine Genevive (Jenny) Nice, My husband's grandfather's sister. Lilly One of my families is Callahan with various spellings. Mary A. Callahan died in childbirth in Cleveland on 03 Oct 1904. Buried from St. Columbkill's. Possibly her parents were Jeremiah and Ann Collins Callaghan. Any connections? Lynne