I am thinking that i am coming 'round to the name Morag.
My 6 year old is reading the Katie Morag books at the moment and i have been thinking about this more and more.
dh is Scottish so it is nice for him, and i like the nn's Mo and Aggie.
Possible combinations:
Morag Susannah
Morag Juniper
Morag Eileen
Morag Primrose
Morag Ophelia
I am not expecting a wonderfully positive response! My dd loves it though!