Ash's baby is replica of her father Abhi:Cinejwala:

It is more than a month after Bollywood actor, Aishwarya Rai Bachchan delivered a baby girl, but the parents, Ash and Abhishek Bachchan as well the grandparents, Amitabh Bachchan and Jaya Bachchan have not yet zeroed on a name for their cute little angel. Grandpa, Amitabh in his recent media interaction was questioned about whom does his granddaughter resembles to which the yesteryear actor replied that, when she was born she had similar features of her mother but now the 1 month old tiny tot looks similar to her dad, Abhishek.

Since, the Bachchans have not yet finalized any name for the new addition to their family, Amitabh
addresses his granddaughter by naming her, ‘Bitiya’. Amitabh admitted that his father, Late Harivansh Rai Bachchan named his other grand children but now the responsibility has come to Big B’s shoulders and therefore he will take time to select an appropriate name for the little angel. Currently the megastar has taken a break from films and is spending more time with his granddaughter.