User blog comment:Jopjopjop/Volume 19 Spoilers/@comment-16281343-20141206023938/@comment-16281343-20141206074335

Kamo Tadami or Tadami Kamo if we follow the wiki's pattern (first name first ) appeared in a short story that was bundled together with the Season 1 BD/DVD Vol.6.

The other two, meh. Probably they'll be explained in Ishi's next update.