Family name סידוניה (Sidonia 
, Sydonia 
, סידוניה 
) , in the world, is quite a rare last name. The cognomen סידוניה is characteristic of Georgia, where it is quite a rare surname, Romania, and Israel. In absolute terms, it is the most numerous in Mexico, Romania, and Poland. More prevalently, סידוניה is the forename as well as the last name.