Possible Clues:

• Middle name of Presley
• 'East of Eden' son named for Moses' older brother
• Steinbeck twin
• "Between a Rock and a Hard Place" memoirist Ralston
• __ Ha-qodesh: Hebrew for "holy ark"
• "East of Eden" brother based on Abel
• “East of Eden” twin
• Cal's twin, in a Steinbeck novel
• ''Moses und __'' (Schoenberg opera)
• Cal’s twin brother in “East of Eden”