Teji Harivansh Rai Srivastava Bachchan was an Indian social activist, the wife of Hindi poet Harivansh Rai Bachchan and mother of Bollywood actor Amitabh Bachchan. From Wikipedia
The younger brother recounts that poet Harivansh Rai replaced Srivastava with his pen name at Amitabh’s school enrollment.
