This is the 5769th most frequent German word.
briatores
The word "briatores" is not a German word; it appears to be a proper noun or unrelated term.
Here, 'Briatores' is used as a proper noun referring to a person, presumably their surname.
Briatores hat gestern ein neues Restaurant eröffnet.
Briatores opened a new restaurant yesterday.
In this sentence, 'Briatores' indicates the artist’s name who signed the painting.
Wir sahen ein Gemälde in der Galerie, das von Briatores signiert wurde.
We saw a painting in the gallery that was signed by Briatores.
This usage refers to the familial context, using 'Briatores' to denote a family surname.