Possible Clues:

• Caleb's twin in "East of Eden"
• Schönberg opera “Moses und ___”
• "East of Eden" son named for Moses' older brother
• One of the Trasks in 'East of Eden'
• Cal's twin in 'East of Eden'
• Northcott or Turcotte
• Playwright Geraldine, or writer Ephron in reverse
• Baseball's Hank
• ''Bruder'' of Moses
• ''East of Eden'' brother