Family name Біркін (Birkin 
, Біркін 
) , all over the world, is quite a rare cognomen. The cognomen Біркін is habitual in the United Kingdom, where it is quite a rare surname, Australia, where it is a rare surname, and New Zealand. Measured by absolute frequency, it is commonest in the United Kingdom, Australia, and Ukraine. Much less frequently, Біркін is the forename as well as the last name.