Cognomen Ingelin (Ingelin 
) , in the entire world, is a rare family name. The last name Ingelin is habitual in Northern Europe, particularly Finland, where it is quite a rare surname, Latvia, where it is a rare surname, and Estonia. Not in comparison with a country's population, it most frequently occurs in Finland, Sweden, and the United States. Likewise, Ingelin is the forename as well as the last name.