Your combos are very sensible and thought-out.
Charlotte and
Nora is a
gorgeous sibset. How fortunate that they are both honoring.
However, I think it's perfectly fair to everyone if you wanted to just use one honoring name per combo, paired with a name you really love. I really, really love
William Haley and
Elijah Bishop "
Will and
Eli." Both of them are great combos, especially with honoring, and I'd love to meet those brothers, and I really, really hope you use them. I also really like
Jacob a lot, but I think the repetitive A sounds in
Jacob Haley are a little much, and I don't like it as much as
William.
Owen,
Zachary,
Lucas, and
Jonathan are all okay names, but rather dull. They don't have
Elijah "Eli"'s smooth intelligence or
William's long and dignified history. (I was just thinking about how wonderfully timeless
William is the other day. Was it used before
William the Conquerer? That's 1000 years anyway. *sigh*)
I would go with
Charlotte Haley and
William Bishop, because I think
William goes better with
Charlotte than your other names (that is to say,
Elijah) do (does). However, I am going to propose something slightly revolutionary: What about
Charlotte Alice and
William Haley?
Allison sounds awkward with
Nora, and
Nora Alice is a bit too clipped. (Have you considered
Eleanor "
Nora"
Alice? I love that.) But I think
Charlotte Alice sounds great, and that
William Haley is /incredibly/ handsome.
Anyway I'm excited about this particular pair of twins :P The names look promising.