Middle name that starts with M?

[hastaxmuerte.livejournal.com]

My brother and his girlfriend are due with a baby girl in about 4 weeks and they need a middle name.
The first name is going to be Sierra, which they came to fairly easily.
A spanish middle name that starts with "M" would be preferred, but not required.

And if it matters at all, the baby will be half american/white and half vietnamese.


Thanks!