proprietor

I think it refers to a female proprietor

A proprietor is the owner of a business and the term can be used for both male and female business owners. The female form of proprietor is proprietrix or proprietress.

Beatrix is the current Queen of the Netherlands, you misspelled it a la Michael Jackson! Curiously this country has had an unbroken succession of Queens since the late nineteenth century- Emma ( dowager)- Wilhelmina (l88o-l962) Juliana ( reigned l948-80?) and currently Beatrix. Beatrix lit. means Blessed Woman as it has the Latin (Trix) female suffix like Aviatrix and Proprietrix. so be it.

Proprietress is the feminine of proprietor.