Family name Swill (Swill 
) , around the globe, is a very rare last name. The cognomen Swill is characteristic of Israel, where it is a rare surname, New Zealand, where it is a very rare surname, and the United Kingdom, where it is an extremely rare surname. In absolute terms, it is commonest in China, the United States, and Israel. Also, Swill is the forename as well as the last name.