meshing and named selection
 

I need to name a part of a face. I did it by imprinting my shape onto the face and put a name for it but when I want to mesh the face (mapped face meshing)
the edges that I imprinted onto the face cause I cant do it( I dont want to mesh the edges) and if I use virtual topology for that face, my named selection changes(form 3 faces turns to 2 faces).

thanks