I pronounce
Helena as HEH-leh-na.
I used to pronounce
Estrella like you did, and I prefer it to es-TRAY-a.
Charlotte is shahr-LAWT in French, but I thought it was pronounced the same way in English as well.
masculine list:
https://www.behindthename.com/pnl/191050/124079feminine list:
https://www.behindthename.com/pnl/191050/124080