Last name Rosnan (Rosnan 
) , all around the world, is quite a rare cognomen. The surname Rosnan is characteristic of Malaysia, where it is quite a rare surname, Singapore, where it is a rare surname, and Honduras, where it is a very rare surname. Measured by absolute frequency, this name is the most popular in Malaysia, China, and Singapore. Much less frequently, Rosnan is the forename as well as the last name.