Conversation so far:
Did Devika Rani elope?
Devika Rani and Najm-ul-Hassan developed a romantic relationship and during the shooting schedule of Jeevan Naiya, Devika eloped with Hassan.
Who did Devika Rani elope with.
Devika Rani eloped with her co-star Najm-ul-Hassan.

Question: Who is he?
Self-contained rewrite: Who is Najm-ul-Hassan?