Often confused with Fardeen Khan's late sister ( aunt) Sonia Sahani. This is due them having the same name. She is incorrectly listed as Sundari Khan's sister on many sites.
Was engaged to actor Shammi Kapoor.
Married Shiv Palitana ( H.H. Shivendra Sinhji ) who passed away in 1990. Shiv was already divorced and had a son. Sonia had a son with Shiv named Ketan Palitana.
Stepson named Dhiren Palitana.
Changed her name from Usha to Sonia for her career.
Has a model niece named Anita Sahni who was to turn actress in 1982.