When I saw the title I thought you wanted to use Miro for a girl, and I think that would be cool. Miro and Rosetta sound great together. Mira and Rosetta too. I like Milo and Rosetta too.
Rosetta Ruth actually sounds good to me, because there's so many letters keeping the r's separate. Mira Ruth doesn't have that.
- - - Katja - - -