Max

Also Polish, more common than the Polish form, Maks:

---

https://pl.m.wikipedia.org/wiki/Max#Inne
https://www.behindthename.com/name/max/top/poland?compare=Maks&type=sample
https://dane.gov.pl/pl/dataset/1667,lista-imion-wystepujacych-w-rejestrze-pesel-osoby-zyjace/resource/54115/table?page=1&per_page=20&q=Max&sort=

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)

Also Slovene: https://www.behindthename.com/name/max/top/slovenia

---

Also French: https://meilleursprenoms.com/popularite-prenom/Max

Also Portuguese: https://www.behindthename.com/name/max/top/brazil

It's also used in Italian.
https://it.m.wikipedia.org/wiki/Max_(nome)
https://www.name-doctor.com/name-max-meaning-of-max-5930.html

Also Romansh:
Source: "Vornamen in der Schweiz. Prénoms en Suisse. I nomi in Svizzera. Prenoms in Svizra" (1993) published by the Association of Swiss registrars
https://sursassiala.ch/2015/01/15/familienforschung/
https://www.portraitarchiv.ch/portrait?page=137

This can be a unisex nickname: Maxine (f), Maximilian (m).

Max is a unisex (nick)name.

Also used in Spanish: https://www.ine.es/widgets/nombApell/index.shtml?L=1

Max is sometimes a feminine name.

Also Provençal: https://ieo-oc.org/spip.php?page=article&id_article=290 --- Source: Institut d'Estudis Occitans

Also Finnish name. Finnish name day November 18.
https://fi.wikipedia.org/wiki/Max [noted -ed]

Max can be a nickname for names that start with Max, like Maxwell and Maximilian for boys or Maxine of girls.

Unisex name/nickname.

Also Catalan: http://www.idescat.cat/noms/?q=Max&lang=en. [noted -ed]

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.

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.

My great grandfather and grandfather were born in Russia and were named Max. [noted -ed]