Keenan \ke(e)-nan\ as a boy's name is pronounced KEE-nen. It is of Irish and Gaelic origin, and the meaning of Keenan is "ancient". See also Kenan and Keane. Actors Keenan Wynn, Keenan Ivory Wayans; football player Keenan McCardell.

Keenan has 7 variant forms: Keen, Keenen, Keenon, Kennan, Kennon, Kienan and Kienen.

Baby names that sound like Keenan are Kannan, Cannan, Kanon, Conan, Kannon, Kannen and Kenyon.