Surname Iljins (Iljins 
) , around the world, is a rare cognomen. The surname Iljins is characteristic of Northern Europe, particularly Latvia, where it is quite a common surname, Lithuania, where it is a rare surname, and Estonia. Not in comparison with a country's population, it most frequently occurs in Northern Europe, particularly Latvia, Lithuania, and Ireland. Very seldom, Iljins is the forename as well as the last name.