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Son of Corneilius Guilfoyle and Roseanna Guilfoyle Brother of Michael J. Guilfoyle; Katherine Carvin; Cornelius Connie Guilfoyle; Margaret Guilfoyle; Rose Lima Maley and 4 others; Martin Guilfoyle; James Leo Guilfoyle; Thomas Guilfoyle and Ann Anderson « less
William Guilfoyle died unmarried with no children.