With 38 923 bearers, Jadwiga is the 153rd most common feminine given name in Poland (2014 Data). About 100% of bearers of this name are Female in Poland (2014 Data).Source: https://forebears.io/x/forenames/jadwiga
This is actually a really cool name. I'm not of Polish descent, nor a speaker of the language; but I live in a part of the United States with a very large Polish population (Chicago-area), so I hear a lot of Polish names on a daily basis where I work: Agnieszka, Beata, Elżbieta, Jadwiga, Kamil, Małgorzata, Patrycja, Stanisław, Sylwia (when people tell me their name is Sylvia, I now ask, "Is it spelled with a V or W?"), Wojciech, and Zbigniew. Those are some of the most common, and you get the hang of pronouncing them fairly quickly.If I were actually Polish, I would easily name my daughter Jadwiga, even though I don't care much for the German parent name, Hedwig.
― Anonymous User 10/17/2016
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Jadwiga is a second name of actress Nina Siemaszko (pronounced "Shyamaszko").
Source: https://forebears.io/x/forenames/jadwiga