Roberta is the feminine name for Rob who is the owner of Military Classified. Erica is the feminine name for Eric who is the owner of Dickthroatorship, a.k.a DTS.
Probably Bobby, judged by what some comments reminiscing about him in the main MC thread. He did like 15 videos with Rob Roberta for about 7-8 years. But like many of Rob Roberta's models, they are old content going all the way back to early/mid aughts. Similar guys like Bobby with long content history but less zeitgeisty are Bryce, Kyle, Brubaker.
CB is shorthand for Chaturbate. NC guy is Livingclean on Chaturbate. There is a long thread about him on lpsg but has since been locked for commenting. You can search him there.
Victoria, Erica, Roberta are feminized names for Vic, Eric, and Rob.
Vic is the owner of Beefcake Hunters, which is sometimes short for BCH. No doubt Vicky, Vickie, etc refer to the same guy.
Eric is the owner of Dickthroatorship, which is sometimes short for DTS.
Rob is the owner of Military Classified, which is sometimes short for MC.
All other names are models that work with them. Some of Vic's models crossed over to DTS or MC or both, and Vic wasn't happy about it, judged by the alleged action that he/she took down their content from his/her website.