Mara over Marie any day of the week.
I'm looking at Mara for a mn for a child, even though it's similar to my name.
It ages very well. I can see it on a small child, a 30-year-old, and a cheerful old lady who likes to work in her garden and talk to kids and bake cookies. I'm hungry...
Mara Margaret is a mouthful, don't like.
Mara Joan is plain, but all right. How about Mara Joanne?
Mara Johanna is nice, but I prefer Joanne.