Thaddaeus
Thaddaeus vel Taddeus est praenomen masculinum hodie usitatissimum in Polonia (Polonice Tadeusz).

Homines 

 Thaddaeus Bellingshausen
 Thaddaeus Brzozowski
 Thaddaeus Cosciusco
 Thaddaeus Gaddi
Taddeus Gaicy
 Thaddaeus Konwicki
 Thaddaeus Kotarbinski
 Thaddaeus Kuntze, pictor
 Thaddaeus Mazowiecki
 Thaddaeus Pankiewicz
 Thaddaeus Płoski
 Thaddaeus Reichstein
 Thaddaeus Rydzyk
Thaddaeus Truskolaski
 Taddeus Zieliński

Praenomina
Praenomina masculina