Also Italian.The Italian Wikipedia page for Andrea (https://it.m.wikipedia.org/wiki/Andrea) lists it as a unisex name, occasionally being used on females.Evidence can also be seen on the popularity chart for Italy (https://www.behindthename.com/name/andrea-2/top/italy). As a masculine name, it stays on the top 10 whereas as a feminine name it is at the bottom of the list.
In 2018, 29 is the most common age for an American (U.S.) Andrea who is registered female with the Social Security Administration. It is the 120th most common female first name for living U.S. citizens.
― Anonymous User 10/16/2018
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In Italy it is widely used as masculine name, but it is also possible to give it to a girl, even though the Italian laws don't allow to give a masculine name to a female and vice versa. This is a very rare case in which it is permitted, most likely because in the rest of the world it is used for females.
This name is quite common in Spanish-speaking countries as a female name. I also recently read that Andrea is common enough among Basque-speakers and in the Basque language it means woman.