The surname Nielssen is derived from the Scandinavian personal name Njáll. This name has the same origin as the Gaelic name Niall, which was adopted by Scandinavian settlers in Ireland. Over time, the forms Niels and Nils developed and the patronymic suffix "sen," or "son," meaning 'son of' was added.
Nielssen Spelling Variations
Spelling variations of this family name include: Nielson, Nielssen, Niellsen, Nilsen, Nilson, Nilssen and many more.
