Not sure if this was clear, but TinCow is currently in possesion of the legion I standard and legion I troops. So I think Legio I - Italia 'Victrix' is what you mean ? Or do you mean he gets to keep the legion I standard and I wait untill the legion IV standard is released to Lucius ?
Anyway, it does not really matter to me who decides. We can let the first consul pick the name and let the senate vote if they can keep it for instance. By the way. I would like to reserve 'Rapax' for whichever legion I end up with :) If it bleeds, we can kill it :)