Where does “Nielsen” come from?

Nielsen (English) comes from Danish Nielsen, from Danish Niels, from Latin Nīcolāus, from Ancient Greek Νικόλαος, from Ancient Greek λᾱός, from Proto-Hellenic lāwós, from Proto-Indo-European leh₂wos, from Proto-Indo-European leh₂- — to bark, howl; to be concealed.

Ancestry of “Nielsen”, step by step

Nielsen traces back through two separate lines of ancestry.

via Danish Nielsen

StepLanguageWordMeaning
1DanishNielsen—
2DanishNielsNicholas
3LatinNīcolāus—
4Ancient GreekΝικόλαοςNicolas
5Ancient Greekλᾱόςpeople; men; the people
6Proto-Helleniclāwóspeople, crowd
7Proto-Indo-Europeanleh₂wospeople
8Proto-Indo-Europeanleh₂-to bark, howl; to be concealed

via Norwegian Nielsen

StepLanguageWordMeaning
1NorwegianNielsen—
2Norwegian-sen-son
Every word from Proto-Indo-European leh₂- →