Max is also used as a feminine name, as a short form of Maxine, Maximiliana, etc. However, it's more common for males. So, I think that the "Gender" of this name should be updated from "Masculine" to "Masculine & Feminine". A known female fictional bearer of this name is Max Einstein, the protagonist of the Max Einstein series of books.Sources: https://en.m.wikipedia.org/wiki/Unisex_name https://en.m.wikipedia.org/wiki/Max_(given_name)
In 2018, 2 is the most common age for an American (U.S.) Max* who is registered male with the Social Security Administration. It is the 546th most common male first name for living U.S. citizens. *as a first name, not a nickname.
― Anonymous User 10/15/2018
2
In recent times, Max has also started to be used as a girl’s name instead of Maxine. It can be either its own name, a nickname for Maximiliana, Maxima or sometimes even Maxine.
Sources: https://en.m.wikipedia.org/wiki/Unisex_name
https://en.m.wikipedia.org/wiki/Max_(given_name)