I've met some Tessas, but no other Tess. I've met one human named Tess.
Conner is a pretty common name, maybe not for dogs. His foster mother actually had another Conner in the house. I've heard of lots of humans called Conner/Connor these days.
Julie and the little darlings...
Tess (fawn girl, born 23-Jun-03)
Conner (fawn boy, rescued 11-Jun-05 @ 8 months)