More like names are taken from words e.g. snow, rain, feathers, righteous, etc. Overtime they will modify the written words by adding or removing a few strokes to indicate that it's a name and not mixing it with normal words in the sentence. It's pretty normal practice just like other languages. Even English still have some daily used names that are like that e.g. Ruby, Apple etc.

I mean, English is full of those, they just get capitalized. Sometimes due to real etymology and sometimes coincidence, like Mark and mark.