O'Donnell

O'Donnell is a surname. It may possibly refer to the following:

In the Halo Universe

 * Lance O'Donnell: The famous Earth socialite.

In the real world

 * Martin O'Donnell: A sound director at Bungie Studios.
 * Bob O'Donnell: The voice actor for the Prophet of Objection in Halo 2, as well as the voice of the Terminals in Halo: Reach.