Nah I don't think so, plus here http://www.erfworld.com/wiki/index.php/Tramennis
it say's it is a play on tremendous and all of the names are a play on some good heroic qualities: He is a Prince more Ossamar, Ansom and Tramennis than a commoner
I would think they have a brother or sister with a name based on charming
I have added 2 alternatives that have been suggested.
Also, I wonder how units are named. If Slately gets to name his heirs, then he may have given Tramennis the name before it was apparent.
OTOH, given that Balder is the one who picks the names, so presumably they have meaning for most of the other characters.
Tremendous is likely what was intended, but I don't think it has hit certainty yet.