I know several
Mary's, and I just noticed a few minutes ago that it is the number one name for all ages in the U.S. (at least it was in 1990).
It's a nice name, classic, although a little plain for my taste.
The main thing I can think of is that it would be a little too similar to
Moira for you to use.
CIARDA
“In the real dark night of the soul it is always three o’clock in the morning.”
– F. Scott Fitzgerald –