Where does “Nu” come from?

Nu derives from Egyptian nnw, a term of unknown meaning referring to the primordial waters in ancient Egyptian cosmology.

Ancestry of “Nu”, step by step

Step	Language	Word	Meaning
1	Ancient Greek	νῦ	nu, the name for the thirteenth letter Ν, ν of...
2	Phoenician	𐤍‬	—

Nu — Etymology, Origin & Word History | Etymology Explorer