Barbara

If Babs can be used for Barbara then I think Abbey, Abbie, Abbi, Abby and Abi could work as nicknames for Barbara.

Also Czech:

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https://www.behindthename.com/name/barbara/top/czech
https://cs.m.wikipedia.org/wiki/Barbora - listed as a variant

Also used in Romansh: http://www.annalas.ch/persunas/display/q:Barbara

Also Dutch: https://www.meertens.knaw.nl/nvb/naam/is/Barbara [noted -ed]

The name Barbara was given to 31 girls born in France in 2019.

Also Languedocian and Gascon: https://ieo-oc.org/spip.php?page=article&id_article=300 --- Source: Institut d'Estudis Occitans

Also Luxembourgish: http://engelmann.uni.lu:8080/portal/WBB2009/LWB/wbgui_py?lemid=HK02547
http://www.actioun-letzebuergesch.lu/virnimm.html
You'll find numerous bearers on social media.

Barbara is also Latvian and Estonian. The name day for Barbara in Latvia is December 4. The name day for Barbara in Estonia is December 4.

Also Corsican: http://www.corsicami.com/corse%20prenoms/prenoms_corses_m12.htm

Also Estonian: https://et.wikipedia.org/wiki/Barbara_(eesnimi)

Also Kashubian: https://csb.wikipedia.org/wiki/Swi%C3%A3t%C3%B4_Barbara

Also Aragonese: https://an.wikipedia.org/wiki/Santa_Barbara_(desambigaci%C3%B3n)
http://www.lenguasdearagon.org/pdf/recursoseducativos/unnombretatu.pdf

Also Czech: https://cs.wikipedia.org/wiki/Barbora --- mentions Barbara
https://krestnijmeno.prijmeni.cz/search.php?name=Barbara&t=1

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

Also Slovak: https://sk.wikipedia.org/wiki/Barbara_(prv%C3%A9_meno)
https://sk.wikipedia.org/wiki/Barbara_Ha%C5%A1%C4%8D%C3%A1kov%C3%A1

In 2018, 63 is the most common age for an American (U.S.) Barbara who is registered female with the Social Security Administration. It is the 20th most common female first name for living U.S. citizens.

The name Barbara was given to 326 girls born in the US in 2016.
More than 99.9 percent of people with the first name Barbara are female.
Also Dutch, Estonian, Finnish, Flemish, Greek, Latvian, Portuguese and Yiddish.

With 26 911 bearers, Barbara is the 49th most common feminine name in Hungary. (01/01/2016).

The name is also used in Sweden, Denmark, Norway, and Iceland.

The name Barbara is also in use in Georgia.

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In Georgian, Barbara is written as: ბარბარა.

Also used in Croatia. [noted -ed]

In Italy Barbara was overused in the 1970s. It was the most popular name in Rome in 1971, the 8th in 1976. Nevertheless, in Italian "barba" means "beard", and "Barbara" means "barbarian woman; uncivilized woman". But fashion is fashion.

Not much given in France, as "barbe" means beard.

This name is commonly used by the Amish.