"Alright, let's go with Alexander. Master, since you placed this name first, there must be a deeper meaning behind it." Jiang Hai did not refuse.
The entire name composition is quite peculiar. Alexander is the first name, and the remaining three parts are all surnames. Jiang is an obscure surname and won't be revealed publicly, while Alexandra is the Royal Family's surname, as the original kingdom was called the Alexandria Kingdom.
Dumbledore is simple, it's the surname Jiang Hai adopted after replacing Little White, and it's a visible surname.
If it weren't for Gu Shanhai's objection, Jiang Hai would have wanted to add the Five Elements Sect, Gu, Zhen Yuanzi, and a series of other titles in the middle so that he could have a long introduction.
The general idea is the longer the name, the stronger the background.
