hm, my wild guess is, Kid 2's name could be "Fujino Shouhei"...
Maybe kid 1 didn't quite catch Shouhei's family name, except "no" part, and asked him what it was before "no".
There are many family names that ends with "no",
中野 "Nakano", 島野 "Shimano", 水野 "Mizuno" and whatnot.
So, 'What "no" did you say?' was the question and 'It's Fuji, Fujino' (藤野) was the answer...?
...Maybe.
Anyone?
Cue