Rhea Silvia was supposed to remain childless but had twins as she was impregnated by the god Mars and therefore she was sent to prison.
The children were left at the river by Mars and were raised by a she wolf and a woodpecker
When the boys grew older they needed their own kingdom and wished to place it where they were raised
But they couldn't decide on the same place so they began building separate walls on opposite hills
Remus became tired of this so he leaped over Romulus's wall but in the end Romulus killed Remus.
Rome was therfore named after Romulus and its hostility and protectiveness tie to what Romulus said when he killed his brother "So perish every one hereafter, who shall leap over my walls." And that is the founding of Rome