Possible Clues:

• ___-El: Superman's birth name
• Penn of ''House''
• Intl. carrier to Seoul
• -- El (Superman's Krypton name)
• Penn of 'Harold & Kumar Go to White Castle'
• __ Kan: Alpo alternative
• Penn of 'Superman Returns'
• Actor Penn of the Harold and Kumar movies
• -- Kan (old dog food brand)
• Penn of "Harold & Kumar"