Name rearranged on Passport, is old B2 visa valid

[w_bhai]

On my mother’s old Indian passport, her entire name was mentioned in the given-name and the last-name was blank. She got her USA visitor visa on that passport and has travelled to the USA several times. Her visa has the entire name mentioned as surname and first-name as FNU (that is typical for such passports).
Now we have renewed her Indian passport and the name is mentioned as it should be, first name as given-name and last name as surname. Her B2 visa on previous passport is still valid and she is planning to visit USA. Can she travel to the USA on that visa?