"I named her Pauline," he told Natalie Morales. "I'm telling you this because I love you. I know that you are a good soul, and I know that this is in good hands."
"There's no other person that I'm thinking about as I'm cutting this umbilical cord," he added. "I knew he was there and I felt like, you know, a way to keep his memory a part of my memory, a part of my world."
Pauline is Diesel's third child with girlfriend Paloma Jiménez. The couple is also parents to daughter Hania Riley Sinclair, 6, and son Vincent Sinclair, 4.
The last time the father-of-three was spotted out in public with his family was back in 2013, when he received a star on the Hollywood Walk of Fame.
Vin's homage to his late friend comes just weeks before Walker's final film, "Furious 7," hit theaters on April 3.