Thelen Family History
Thelen Surname Meaning
Dutch and North German: patronymic from a pet form of the ancient Germanic personal name Thietilo. Thelen is a variant of Thielen.
Swedish (Thelén): ornamental or habitational name from the element Thel- of uncertain meaning (see Thelander) + the adjectival suffix -én, a derivative of Latin -enius ‘relating to’.
Compare Thelin.
Source: Dictionary of American Family Names 2nd edition, 2022
