Abigail Witchalls, the young mother stabbed in the neck in April, has left hospital with her week-old son, who has been named Dominic Adrian.
A hospital statement said Mrs Witchalls had a natural birth
Mrs Witchalls, 26, was left partially paralysed after the attack near her home in Little Bookham, Surrey.
Her pregnancy was revealed two months after the stabbing, which happened as she walked along a country lane with her toddler son Joseph.
She said carrying her second son had given her "great strength and comfort".
'Lots of cuddles'
The baby was born weighing 5lbs 6oz last Friday afternoon at St George's Hospital in Tooting, south London.
Mrs Witchalls had been discharged from hospital a week earlier after six months of treatment for her injuries.
A statement issued by a family spokeswoman said Dominic meant "of the Lord" and that Adrian was a family name.
"Joseph is enjoying being a 'big brother' and is giving Dominic lots of cuddles," it added.
The baby was baptised at a family service in Little Bookham on Friday by priest Father Marie-Dominique Philippe, a French Dominican who is a friend of the family.
Mrs Witchalls suffered a three-inch wound in the back of her neck in April's attack.
The attacker also held a knife to her son Joseph's throat.
Surrey Police began investigating 23-year-old Richard Cazaly as a suspect after he apparently committed suicide in Scotland just 10 days after the attack.
A file was passed to the Crown Prosecution Service on 2 August.