Maybe you mean "kotehan" for the first word? It means "handle name". When the one holding the nama asks for the commenters' kotehan, he's asking them to be un-anon or to put a name beside their comment (using @(name)) so he'll know who he's talking to. There's more information about that in my namahousou guide.

I am not sure what the second one is because I haven't heard it before ;;. Sorry.