I absolutly love the name
Eloise! I don't think
Lois works as a nn.
Louise would, but I don't think it needs one, as it's pretty short (
El and
Ellie would too). The spelling Aloise isn't icky, but I prefer
Eloise by a long shot. I'm also a fan of your sibset, though I don't really like the name
Ewan in general.