Nanuk is also used as a feminine name in Inuit/Inuktitut. However, it's more common for males. So, I think that the "Gender" of this name should be changed from "Masculine" to "Masculine & Feminine". Some variants of this name are Nanuq (already in the main name collection), Nanook (already in the main name collection), Nanouk (in the user-submitted name collection), and Nuniq (in the user-submitted name collection).Source: https://forebears.io/x/forenames/nanuk
Source: https://forebears.io/x/forenames/nanuk