Thomasen

Thomasen is a surname of Danish origin. It is a patronymic derived from the given name Thomas, with the suffix -en indicating “son of” in Danish usage. The given name Thomas itself comes from the Late Latin Thomas, ultimately from the Aramaic תאוֹמָא (Ta'oma) meaning “twin.”

In Denmark and areas influenced by Danish naming practices, Thomasen is one of several forms created from the name Thomas; related Danish patronymics include Thomassen and Thomsen. The form Thomasen reflects a common pattern of adding a suffix to a personal name to indicate lineage.

Geographically, the surname is most common in Denmark and among Danish-speaking communities, with occurrences in Norway and Germany through migration. It remains relatively less common than some other Thomas-derived surnames but is recognized as part of the broader family of Danish patronymics based on the given name Thomas.

Notable bearers with the surname Thomasen are not widely documented in major encyclopedias, and there are no universally recognized individuals with a standalone encyclopedic article. The name, however, appears as a surname among people in Nordic regions and elsewhere, illustrating the enduring legacy of patronymic naming practices.

See also: Thomas (given name); Thomassen; Thomsen; Danish surnames.