Rekha, a very known personality of bollywood entered in this industry a long time ago but her actual and real name isn’t Rekha. Her real name is Bhanurekha Ganeshan, a girl of Tamil performing artist- Gemini Ganeshan. She changed her name to Rekha to make is more appealing and short.
The big b of bollywood Amitab Bachchan, are you aware of his real name? His real name is Inquilab Srivastava which is taken from the trademark, Inquilab Zindabad but later recommended by some kindred writer he named himself as Amitab Bachchan. Short and unique.