I know there's been lots of people choosing Cardinal as a more unique new hero name for Tim (cause let's be honest, him mashing up names of two first people he could think of, both of which are his brothers, AND also a name of a fastfood chain is pretty lame).
But aside from the fact that there's already a marvel hero called Cardinal, people aren't choosing the obvious superior option:
Redstart
Redstarts are part of the same family as robins and are closely related. The painted redstarts however, on which I'm basing my idea, are not (and are classified as "whitestarts" and are only in the same genus, not family, but are still misnamed as redstarts due simillar looks), which would connect him to his origins as robin while still keeping him a separate entity.
It contains part "red" as the RR does and "start", which not only could reference his "new start" but also, considering that the "start" in the name is also archaic word for "tail" could reference him "tailing" behind the clues about Bruce's status during his debute.
The Old World name of the genus, Phoenicurus, could also reference his "rebirth" as a new hero.
Edit: redstarts are also apparently traditionally used as a symbol of change, transformation and new beginnings, which again.
Also, his suit and the painted redstart coloration and its configuration are basically the same
(pictures for comparision so you can see what I mean)
Also, his feather cape looks kinda like the redstarts tail if you replace the red on it with white, which they fan when seeking and "hunting" for bugs to make them come out
your honor, these are the same picture
Edit: so I made a post like this about Jason if you're interested
















