Minahan is a variant surname of the Irish Moynihan. Notable people with the surname include:
Cotton Minahan (1882–1958), American baseball player and track and field athlete Daniel Minahan, American television and film director and writer Daniel F. Minahan (1877–1947), American politician James Minahan (1872–1941), Irish-born Australian politician Patrick Minahan (1866–1933), Irish-born Australian politician Robert E. Minahan (1858–1935), American mayor
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