It was right after Jaan Tere Naam released that is was revealed that his wife name was Johaina Mumtaz Khan. She was the niece of actor Dilip Kumar (Dilip's sister Taj's daughter). Johaina's paternal grandfather was politician Fazal Nawaz Jung Badhur. Ronit Roy and Johaina have a daughter named Ona Roy who is a world famous packaging designer based in New York, USA. she was born in 1991. Johaina has since remarried to Jamal and has a son named Zayed . Johaina's elder sister Rubaina Mumtaz Khan was married to actor Mazhar Khan ( who went on to marry Zeenat Aman). Mazhar and Rubaina's son Azhar Khan is now a actor in Hollywood ( TV serial Mr. Robot). Rubaina is now married to Sanjay Nagpal ( Former fiance of actress Ektaa Sohini Bahl). Johaina's brother's name is Syed Fahd Asad Mumtaz. He is married to former actress Kiran Vairale. They have a son named Asaad Mumtaz.