Anneli

As of January of this year, there have been 16 women in Poland with the first name Anneli. 19 others bear it as their middle name.

As of January of this year, 15 women in Poland were named Anneli.

Anneli is definitely not a well-known name in Poland, nevertheless, last year, there were 15 women with this name in the Polish population. 18 had it as a middle name. No children were given this name in Poland last year.
An Anneli could celebrate her name day in Poland together with Anna (July 26) and use the same nicknames as Anna, plus perhaps also something like Nela, Nelka, Nelusia, Neli, Anelka etc.

Also Afrikaans: https://af.wikipedia.org/wiki/Anneli_van_Rooyen
You'll find numerous bearers on social media.

I'm not sure, but this name appears in Northern Germany every so often (I used to associate it with one or two rather elderly women in the villages around my place, but it seems to be becoming popular as a girl's name again - many of the old names do) that I have a hard time believing that it should be labelled as a "Finnish diminuitive" only.
I might be wrong, though. We've got quite a few Scandinavian-influenced names around here, after all. It used to be fashionable at times.

This is also the Swiss pet form of Anna. -li is the diminutive ending in Swiss German.

This is also a Swedish name, originally used as a petform of Anne-Louise and similar names, but used as a seperate name since the late 1800's. Annelie is a more modern spelling, used 50/50 in Sweden.

It's a very uncommon name.