John Henry Phelan (1877–1957), secretary-treasurer of the Yount-Lee Oil Company
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John Leddy Phelan, Beveridge Award award-winning author of The People and the King: The Comunero Revolution in Colombia, 1781
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John J. Phelan, Supreme Knight of the Knights of Columbus and Secretary of the State of Connecticut
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John Phelan was the grand-nephew of James Phelan, Bishop of Ossory (d. 1695).