What's the name of Phoebe's half-brother in the American TV series "Friends"?

Frank Buffay Jr. (Giovanni Ribisi) is Phoebe's half-brother by their father. In "The One with the Bullies", Phoebe meets him after finding the courage to knock on her father's suburban door, but learns from Frank Jr.'s mother (played by Laraine Newman) that her father walked out several years ago. Despite not finding her father, she connects with Frank Jr. who later visits the city where he hits on Jasmine, one of Phoebe's coworkers, and mistakes her massage parlor for a whorehouse.

He eventually falls in love with and becomes engaged to Alice Knight (Debra Jo Rupp), his former home-economics teacher who is 26 years his senior. In "The One With Phoebe's Uterus", Frank and Alice ask Phoebe to be a surrogate mother for their child, and she later gives birth to their triplets, whom she then says goodbye to in an emotional scene in "The One Hundredth".

Frank makes a final appearance in "The One Where Ross is Fine", when he and the triplets meet Phoebe at Central Perk. In the episode, he claims he "hasn't slept in four years" and is so exhausted with raising the triplets he even proposed that Phoebe take one for her own. However, he soon realizes he loves his children too much to give any of them up; Phoebe proposes to start babysitting them so that Frank and Alice can enjoy some more time off.