Grace Kelly's lineage appears to be as follows sketchy at best: Brian Kelly b. County Mayo, Ireland 1804 -m-Honora Margaret McLaughlin b. Ireland c. 1821 d. Rutland May 1, 1884 John Henry Kelly b. County Mayo -m- Mary Costello b. Ireland October 18, 1852 d. Philadelphia September 1926 John Brendan Kelly b. Philadelphia October 4, 1889 d. June 20, 1960 -m- Margaret Maier b. Philadelphia 1899 Grace Patricia Kelly b. November 12, 1929 Philadelphia d. September 14, 1982 Monaco Maureen Johnson (Kelly) If I were related to a famous Kelly I think I would pick the clown.