Nilsen Family History
Nilsen Name Meaning
Norwegian: patronymic from the personal name Nils a shortened form of Nikolaus. This form of the surname is also found in Denmark but it is rare there. Compare Nelsen . Altered form of Norwegian Nilssen a variant of 1 and probably also of the Danish Norwegian or North German cognate Nielsen (compare Nilson ).
Source: Dictionary of American Family Names ©2013, Oxford University Press