If you go to the advanced search page and search by usage, you can find rare, modern and archaic at the bottom of the drop down list.
https://www.behindthename.com/names/usage/rarehttps://www.behindthename.com/names/usage/modern
Portuguese (Brazilian) does not appear in that list, but here is a link to invoke the search:
https://www.behindthename.com/names/usage/portuguese-brazilian