Keenan
- Brian Keenan (Irish republican)
- Brian Keenan (musician born 1943)
- Brian Keenan (writer)
- Brigid Keenan
- Cathy Keenan
- Celia Keenan-Bolger
- Cian (name)
- Corey Graves
- David Keenan
- Deborah Keenan
- Don Keenan
- Donal Keenan
- Edward L. Keenan
- Emma Keenan
- Frank Keenan
- Frank Keenan (hurler)
- Gareth Keenan
- Harold Keenan
- Harry Keenan
- Helen Grace Scott Keenan
- Henry Francis Keenan
- Irish surname
- Jack Keenan (boxer)
- Joe Keenan (footballer)
- Joe Keenan (writer)
- John F. Keenan
- John Keenan (Medal of Honor)
- John R. Keennan
- Joseph B. Keenan
- Joseph Henry Keenan
- Keenan Allen
- Keenan Clayton
- Keenan Cornelius
- Keenan Evans
- Keenan Garber
- Keenan Hollahan
- Keenan McCardell
- Keenan Robinson
- Keenan Wynn
- Keenen Ivory Wayans
- Kenan Thompson
- Lillie Keenan
- Luke A. Keenan
- Maguire family
- Maynard James Keenan
- Michael Keenan (politician)
- Mike Keenan
- Murder of Keenan O'Mailia
- Nancy Keenan
- Nicolás Keenan
- Norbert Keenan
- Paddy Keenan
- Pepper Keenan
- Peter Keenan
- Peter Keenan (boxer)
- Philip Childs Keenan
- Phuwaryne Keenan
- Roy Keenan
- Shy Keenan
- Sinead Keenan
- Tamra Keenan
- Terry Keenan
- Tim Keenan III
- Trish Keenan
- Vernon Keenan (law enforcement official)
- Ó Cianáin