Wendy is not of Hebrew origin and has no equivalent in Hebrew. In fact, the name has no meaning at all. it was a made up name created by J.M Barrie when he wrote Peter Pan.If you want to spell it out phonetically with Hebrew letters, it's: וונדי, which is pronounced Vendy (since there is no w in Hebrew).
Wendy Lanuza's birth name is Wendy Marissa Lanuza.
Wendy Pini's birth name is Wendy Fletcher.
Wendy Sims's birth name is Wendy Crawford.
Wendy Waldman's birth name is Wendy Steiner.
Wendy Dio's birth name is Wendy Galaxiola.
Wendy Westerfield's birth name is Wendy Moreira.
Wendy Schaal's birth name is Wendy K. Schaal.
Wendy Rawady's birth name is Wendy Elizabeth Siddell.
Wendy Taubin's birth name is Wendy Ilyse Taubin.
Wendy Partridge's birth name is Partridge-Hudolin, Wendy.
Wendy Crouse's birth name is Wendy Carolyn Crouse.
Wendy Cutler's birth name is Wendy Ellen Cutler.