I love both names - we recently named our baby
Nora Maeve!!
From your list my favourite combos are
Nora WilhelminaNora Sabrina - I prefer
Sabine
Maeve ElsaMaeve Marion (This sounds a little bit like Maid
Marion. With the second middle flow might be better?)
Although not very familiar with Russian Orthodox saints, I did a quick search and I really like:
XeniaBarbaraEudoxia
I adore and would definitely use
Nora Xenia Sabine