I used to wonder if Sonam Kapoor (born 1985) was named after Sonam (born 1972) but it turns out it was the other way around.
The 80s/90s actress Sonam was born as Bakhtavar Khan in 1972. Her debut film Vijay was released in 1988. She worked in the Yash Chopra film alongside Rishi Kapoor and Anil Kapoor. It was during the filming in 1986/1987 that Yash Chopra decided to give her a more marketable name, and Anil suggested Sonam (who was 1-2 years old at the time, and often visited the sets).
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