English: Ash ketchum

Japanese: サトシ Satoshi

Name source

The name comes from the creator of Poké mon Tian Kaozhi, and the English name Ash comes from the pseudonym Satoshi of the Japanese name in Xiao Zhi. Remove the four letters stoi and leave Ash.

The name Katchum comes from "catch' em" [American version of Poké mon slogan: Catch them all! Equivalent to "I got Poké mon!" ] Reading together is ketchum.