What does "die Herren sind genennet ?" mean?
Just guessing, but I think you have to read this line together with the previous line
Wez denn lebent dieselben Frist,
Die Herren sind genennet ?
Wez, I think, is „wes“ (mis-spelt or an old form), which would be „wessen“ in modern German. So „whose“ rather than „who“, and the two lines together could mean something like „of those who life in these times, whose lords are named?“ or „for whom among those who live at this time are the lords named?“
No idea if this makes any sense, and I must stress that this was really no more than a guess. Hopefully someone will come along who actually knows their way around early modern German, or however this version of the language is properly called.
