Nice job

My god he knows he's pretty.

his name is Yahya (official translated thanks to Viz media)

His name in japanese is ヤフヤ with katakana (Yafuya). Katakana is typically used with foreign words and probably to show the pronunciation of things more accurately.
Fu is actually a sound between f and h so it makes sense why they would "translate" the name as Yahya depending on how the creator pronounces the name. Because if people are going around saying "Ya-fu-ya" instead of "Yafya" it would sound completely different if that makes sense.