Excessive media references are excessive. (Director Commentary clarifies this for the non ATLA fans.)

↓ Transcript
Considering this list of baby names, I may as well and just go ahead and officially confirm the fandom speculation that, yes, Suko is named after Zuko from Avatar: The Last Airbender. XD

For this reason the baby's name was originally going to be Asu La, but... well, it's an unlucky name. XD

For those unfamiliar with the Last Airender franchise, the names listed are all sarnothi pronunciations of ATLA character names.

Suko = Zuko
Tai Li = Ty Lee
Kio Shi = Kyoshi
Bei Fon = Bei Fong (Toph's surname)