SienkiewiczPolish Patronymic from the given name Sienko, an old diminutive of Szymon. This was the surname of the Polish writer Henryk Sienkiewicz (1846-1916).
SimpsonEnglish Means "son of Sim", Sim being a medieval short form of Simon 1. This is the name of a fictional American family on the animated television series The Simpsons, starting 1989.
SwansonEnglish Patronymic form of Middle English swein meaning "servant" (of Old Norse origin). This word was also used as a byname, and this surname could be a patronymic form of that.
TrudeauFrench (Quebec) From a diminutive of the given name Thouroude, a medieval French form of the Norse name Torvald. This name has been borne by two Canadian prime ministers, Pierre Elliott Trudeau (1919-2000) and his son Justin Trudeau (1971-).
TschidaGerman Possibly derived from a Slavic given name of unknown meaning.