Why do Americans basically have "suck" in their names? What do you mean, terrible?
Son, transliterated as "Xun", means "son". . . So Jackson must have evolved from Jack. . .
The names of foreigners are fixed. In ancient times when there was no surname, father and son often used the same name. At this time, a "son" was added as a difference. Later, many names of "Xun" were formed. . . .