die from a festering ulcer in his foot, which his enemies said was the revenge of Irish saints whose shrines he had violated. The genetic line can also be traced to Dermot MacMurrough, the Gaelic king of Leinster reviled in history books as the man who sold Ireland by inviting Strongbow's invasion to save himself from a local feud. Bill Clinton (Irish, Scotch-Irish & English) 42nd President 1993–2001: He claims Irish ancestry despite there being no documentation of any of his ancestors coming from Ireland. George W. Bush (Irish, Scottish, Dutch, Welsh, French, German & English) 43rd President 2001–09: One of his five times great-grandfathers, William Holliday, was born in Rathfriland, County Down, about 1755, and died in Kentucky about 1811–12. One of the President's seven times great-grandfathers, William Shannon, was born somewhere in County Cork about 1730 and died in Pennsylvania in 1784. Barack Obama (Kenyan, English & Irish) 44th President 2009–2017: His paternal ancestors came to America from Kenya and his maternal ancestors came to America from England. His ancestors lived in New England and the South and by the 1800s most were in the Midwest. His father was Kenyan and the first of his family to leave Africa. His great great grandfather, Falmouth Kearney, was born in the Irish town of Moneygall. Joe Biden (Irish and English) 46th President 2021-present: Through his father, his ancestors are partly from Ireland, and his family are practicing Roman Catholics. Science Jim Collins – Rhodes Scholar, MacArthur genius, bioengineer and inventor John Philip Holland – inventor of the submarine, Fenian Charles Brian Montagu McBurney – medical pioneer, known for early reports about appendicitis John Murphy (engineer) – invented ARCNET, the first commercial networking system Joseph John O'Connell – electrical engineer and inventor, invented the circuit breaker, the coin return, and the "invisible wire" which was the first time more than one telephone conversation could occur on the same wire O. Timothy O'Meara – mathematician, University of Notre Dame Charles Townes – physicist, Nobel Prize in Physics laureate James Watson – molecular biologist, discoverer of double helix structure DNA, laureate Sports Brendon Ayanbadejo – American football player Obafemi Ayanbadejo – American football player Laila Ali – former professional boxer Muhammad Ali – legendary professional boxer; descended from the Abe O'Grady, Ennis, County Clare James J. Braddock – champion boxer Kyle Brady – American football player Tom Brady – American football quarterback Tom