1. I'd pronounce both as ES-tay.
2.
Estée.
3. ES-tay > ES-tee > es-TAY
4.
Estee would make some sense for ES-tee, at least.
Estée would make none.
masculine list:
https://www.behindthename.com/pnl/191050/124079feminine list:
https://www.behindthename.com/pnl/191050/124080