Surname Bennan (Bennan 
, 本楠 ) , throughout the world, is a rare cognomen. The surname Bennan is characteristic of Morocco, where it is a rare surname, Australia, where it is a very rare surname, and Argentina, where it is an extremely rare surname. In absolute terms, it is the most numerous in Morocco, India, and the United States. Also, Bennan is the forename as well as the last name.