Surname תדיאוש (Tadeusz 
, תדיאוש 
) , worldwide, is a prevalent cognomen. The last name תדיאוש is characteristic of Poland, where it is a prevalent surname, Hungary, where it is a rare surname, and Israel. Not in comparison with a country's population, it is the most numerous in Poland, Hungary, and Spain. Much less frequently, תדיאוש is the forename as well as the last name.