Bastiaanssen

Bastiaanssen is a Dutch surname. It is a patronymic name meaning “son of Bastiaan,” with Bastiaan being the Dutch form of Sebastian. The suffix -sen denotes lineage in Dutch surname formation, and Bastiaanssen is a variant with a doubled s. Related spellings include Bastiaanse, Bastiaansen, Bastiaans, and Bastiaanssen, reflecting regional pronunciation and orthographic differences.

The name is primarily found in the Netherlands, where patronymic surnames based on given names were common. Outside the country, Bastiaanssen can be encountered among Dutch-speaking communities in Belgium and among the global Dutch diaspora, including North America and Australia.

In genealogical sources, Bastiaanssen appears in civil and church records that document family lines and local populations, illustrating how surnames were formed from a father's given name in historical contexts. Today, Bastiaanssen functions as a family surname and is carried by multiple, largely unrelated lineages. It is part of a broader pattern of Dutch patronymic surnames derived from the given name Bastiaan, itself rooted in Sebastian.

Overall, Bastiaanssen is a regional Dutch surname with several closely related variants, reflecting historical naming practices and regional spelling differences rather than a single, unified lineage.