Winter, Tiernan, and Tessa/Tessie are my favourites. Not sure where you live but unless you have a meaningful connection or history with the state of Tennessee (b/c it seems like a one-of meaning word and has native significance) I would go directly to the short form.
[name_m]Tennessee[/name_m] “Tessa”, “Tessie” (As someone from the southern US, I’m having trouble wrapping my mind around this one. However, [name_f]Georgia[/name_f] is an established name so who knows?)