I won't go into the whys and whos of that name.
If I saw it, my first thought would probably be "Too bad it's not Moira".
I love it!
I LOVE Miriam!
I think these names work well with your other childrens' names. Do any of them appeal to you?
Maribel (NN Mari or Bel)Matilda (NN Mattie, Tilda or Tillie)Melinda (NN Mel or Mindy)Monica (NN Monnie, Nic or Nicky)
What about Maren? I considered this name for a while and got LOTS of positive feedback. In the end it wasn't frilly enough for me.
Maura immediately makes me think of other "mau" words like "maul" and "Maury Povich". Also, it's not crystal clear if it's MAW-ra or MOR-ah. Kind of the problem with Laura. (LAW-ra or LOR-ah, you never know.)