Cognomen Tadeush (Тадеуш 
, Тадэуш , Tadeush 
) , all around the world, is a rare surname. The last name Tadeush is characteristic of Eastern Europe, particularly Belarus, where it is quite a rare surname, Ukraine, where it is a rare surname, and Russia, where it is a very rare surname. More frequently, Tadeush is the forename as well as the last name.