Ernest

This is apparently also very popular in English-speaking African countries, especially Ghana.
https://forebears.io/forenames/ernest

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://www.kulturarchiv.ch/fileadmin/pdf/Neues_von_den_Zuckerbaeckern_aus_Graubuenden.pdf
https://www.portraitarchiv.ch/portrait

Also Albanian: https://instatemra.shinyapps.io/emra/
https://sq.wikipedia.org/w/index.php?search=Ernest&title=Speciale:K%C3%ABrko&profile=advanced&fulltext=1&ns0=1

Also Croatian: https://actacroatica.com/en/name/Ernest/

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

Also Banatswabian: https://ofb.genealogy.net/famreport.php?ofb=zichydorf&ID=I28091&nachname=Bohn&modus=&lang=de
https://ofb.genealogy.net/famreport.php?ofb=zichydorf&ID=I22457&nachname=Haich&modus=&lang=de

Also used in Romania: https://ro.wikipedia.org/wiki/Ernest_Maftei

Also Slovak: https://sk.wikipedia.org/wiki/Ernest
https://en.wiktionary.org/wiki/Ernest#Slovak

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

In 2018, 63 is the most common age for an American (U.S.) Ernest who is registered male with the Social Security Administration. It is the 310th most common male first name for living U.S. citizens.

The name Ernest was given to 208 boys born in the US in 2016.
More than 99.9 percent of people with the first name Ernest are male.

Ernest is also used in Poland, where it has at least four name days. [noted -ed]

Ernest is occasionally used in Croatia.

Also a masculine name in Slovenia. [noted -ed]