From the experts:
Esau is one of the neglected E-beginning boys' biblical choices--it's been off the popularity lists since 1902! The name of Jacob's twin brother, son of Isaac and Rebecca, Esau could make an ideal twin choice, if you don't mind its meaning and the difficult story in the Bible behind the name, as convoluted and full of drama, tragedy, and reconciliation as any soap opera
There's a Grateful Dead song "My Brother Esau." Kids might be familiar with the jingle "I saw Esau on the see-saw."