Captain Paul Thayer Iaccaci (pronounced ya-catchy 26 July 1890 – 8 August 1965) was a World War I flying ace credited with 17 aerial victories.

He was born to Auguste Florian Iaccaci (1857-1930) and Mabel Thayer on 26 July 1890.

From June 1913 to December 1916 he and his younger brother August served with the 7th Regiment N.Y.N.G; they both went to Canada and joined the Royal Flying Corps in 1917.

[1] He married Marie L. and they divorced on 12 April 1938 in Garland, Arkansas.

A bold and successful fighter, who on four offensive patrols has accounted for six enemy aeroplanes: two he shot down himself, and four were destroyed with the assistance of his observer.