William Leahy

William Leahy may refer to:

William D. Leahy (1875–1959), American naval officer, diplomat. and chairman of the Joint Chiefs of Staff in World War II
William Leahy (DCM) (1893–1918), Australian World War I Distinguished Conduct Medal recipient
William Harrington Leahy (1904-1986), American naval officer
F. William Leahy (1908–1973), known as Frank Leahy, American football coach
William P. Leahy (born 1948), President of Boston College

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