Brin

As an English name, this name can also be a Feminine name as a variant of Bryn and Brynn making this name Unisex.
According to the USA Social Security Administration, 21 girls were named Brin in 2003.
https://www.behindthename.com/name/bryn
https://www.behindthename.com/name/brynn
https://www.behindthename.com/name/brinn/submitted

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https://www.names.org/n/Brin/about
https://www.popular-babynames.com/name/Brin
http://www.nancy.cc/baby-name/Brin/
https://www.names.org/predictions/Brin
https://forebears.io/x/forenames/brin

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This is an update to my previous comment via @LionB3 on Apr/21/2020

Also, it can be ENGLISH.

This name can also be FEMININE, making it UNISEX.
In the USA, it was given to 16 girls in 2004.

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https://www.names.org/n/Brin/about
https://www.popular-babynames.com/name/Brin
http://www.nancy.cc/baby-name/Brin/
https://www.names.org/predictions/Brin

Given to 16 girls in America in 2014.

Also a masculine name in Slovenia.

Since the 1880's Brin hasn't appeared on the top 1000 list for either a boy or girl.