ABKSever
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The team should come up with the names themselves; the captain decides and chooses from the suggestions made by the participants, or comes up with something on their own.
Regarding templates, Jebus shouldn't be used. Moz himself said that this template is not suitable for tournament games (or for a tournament exclusively using it). Those interested in why I think so can watch Moz's stream with Kontra.
In general, regarding the choice of template, I'm all for a free choice.