Tekla

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

Also basque:
https://www.euskaltzaindia.eus/index.php?option=com_ecoeoda&task=izenaIkusi&Itemid=792&lang=es&kodea=2067&mota=izenak

Tekla is also Croatian, Estonian, and Latvian. The name days for Tekla in Croatia are September 23 and October 15. The name day for Tekla in Estonia is September 23. The name day for Tekla in Latvia is January 31. [noted -ed]

Also a Banatswabian variant of Thekla: https://ofb.genealogy.net/famreport.php?ofb=zichydorf&ID=I14947&nachname=Heckl&modus=&lang=de

This name was also used among the German minority in Bessarabia: https://ofb.genealogy.net/famreport.php?ofb=krasna&ID=I7072&nachname=Steinke&modus=&lang=de
https://ofb.genealogy.net/famreport.php?ofb=krasna&ID=I7282&nachname=Riehl&modus=&lang=de

Also Estonian (albeit rare nowadays): https://et.wikipedia.org/wiki/Tekla_(eesnimi)
https://www.stat.ee/public/apps/nimed/

Also Breton: https://br.wikipedia.org/wiki/Tekla
http://www.meilleursprenoms.com/stats/prenoms_stat.php/Tekla

Also Slovak (albeit archaic): https://sk.wikipedia.org/wiki/Meniny_na_Slovensku --- name day: September 23
https://www.geni.com/people/Tekla/6000000014146711016

Also Czech (albeit almost archaic): https://cs.wikipedia.org/wiki/Svat%C3%A1_Tekla
https://krestnijmeno.prijmeni.cz/search.php?name=Tekla&t=1

Also Latvian: https://www.pmlp.gov.lv/lv/sakums/statistika/personvardu-datu-baze/?id=137&query=Tekla

This was a popular name in Poland at the turn of the 19th century.

Although pretty rare, it is also used in Poland. It always struck me as an old lady name but just recently I've met a little girl named Tekla and I must say, it is rather sweet on a small child.

This is also used in Poland.

Looking back at the Name Days page, I bet Tekla is used in all of the countries that have a name day for it. :)

My name is Tekla and it is Swedish in my case!

Also used in Sweden.

Tekla is also the Georgian form of Thekla.

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In Georgian, Tekla is written as: თეკლა.