Adam

Also Guernésiais: http://dbooks.bodleian.ox.ac.uk/books/PDFs/590676737.pdf

Also Basque:

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https://www.euskaltzaindia.eus/index.php?option=com_ecoeoda&task=izenaIkusi&Itemid=&lang=es&kodea=21&mota=izenak

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https://www.behindthename.com/name/adam/top/basque_country

Also Slovene:

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https://sl.m.wikipedia.org/wiki/Adam
https://sl.m.wiktionary.org/wiki/Adam
https://www.behindthename.com/name/adam/top/slovenia

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Also Spanish:

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https://es.m.wiktionary.org/wiki/Adam
https://en.m.wiktionary.org/wiki/Adam#Spanish
https://www.ine.es/widgets/nombApell/index.shtml?L=1

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Also Icelandic:

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https://www.nordicnames.de/wiki/Adam
https://en.m.wiktionary.org/wiki/Adam#Icelandic

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Also Maltese:

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https://en.m.wiktionary.org/wiki/Adam#Maltese
https://forebears.io/forenames/adam

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Also Italian: https://www.behindthename.com/name/adam/top/italy

As a Russian patronymic, it is Адамович (male) and Адамовна (female)

Also Afrikaans: https://af.wikipedia.org/wiki/Adam

Also common in Indonesia and Malaysia.

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://rm.wikipedia.org/wiki/Filip_Gallicius -- Adam Saluz
Https://rm.wikipedia.org/wiki/Adam_Nauli
Http://www.annalas.ch/persunas/display/q:Adam

Also Niçard: http://www.sourgentin.org/cours-de-nissart/les-prenoms/

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

Also Luxembourgish: http://engelmann.uni.lu:8080/portal/WBB2009/LWB/wbgui_py?lemid=HK02547

Also Chechen: https://pl.m.wikipedia.org/wiki/Adam_Osmajew (in Polish)

This name comes in many languages! Btw, it can also be in Greek. [noted -ed]

Also Cornish: https://kw.wikipedia.org/wiki/Jenesis

Also Vilamovian: https://pl.wiktionary.org/wiki/Adam#wym

Also Belarusian, spelled Адам : https://en.wikipedia.org/wiki/Adam_Stankievi%C4%8D

In 2018, 26 is the most common age for an American (U.S.) Adam who is registered male with the Social Security Administration. It is the 96th most common male first name for living U.S. citizens.

This is also the Catalan form of the name. [noted -ed]

The Greek name day is December 10. It is also used in Modern Greek.

The name is also rather common in Iceland.

The name Adam is also in use in Georgia.

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In Georgian, Adam is written as: ადამ. [noted -ed]

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

I think Arabic or Muslim should be added to the usage list, as Adam is a popular name amongst Muslims. It is generally pronounced AA-dem though, with a somewhat longer a sound at the start. The meaning is entirely the same though, and refers to the first man on Earth. (Many Islamic prophets are also Biblical characters - e.g. Isa/Jesus, Ibrahim/Abraham, Marian/Mary). [noted -ed]

Adam is also the Czech, Slovak, Dutch and Serbian form. [noted -ed]
Czech and Slovak pronunciation is "AH-dahm".

Also used for boys in Slovenia.