I like
Isobel very much in any position at all.
At university I knew two inseparable friends - ditzy, pretty Drama students - who were both
Isabel. For convenience, they were known as
Bella and Iz. I prefer
Bella to
Belle - less bicycle - but either would do. And I don't find
Izzy unfeminine - can't imagine a male
Izzy, and wouldn't it depend on the owner? A very girly
Isobel would swing it, and a tomboy
Isobel would make anything seem butch and tough ...
I've also heard of Tibbie as a nn for
Isobel,
Isabella etc - allegedly Scottish - but I have no direct evidence. I do know an
Isobel who says she was known as Iso (pronounced Izo) at home, but all her friends plus husband use
Isobel.
I dislike
Charlotte and find it both boring and unpleasant; and I don't like the sound of it. So, yeah, use it in the middle if anywhere! If it were me, I'd much rather go for
Caroline or even Carl(ott)a.
Caroline, especially, is far enough away from
Charles to go unnoticed - except on these boards, of course!
Isobel Linnea is tricky to pronounce. OK, one doesn't do it often.
Jessamine sounds better but it's a bit too frilly for me.
Isobel Mary,
Isobel Dorothy or
Dorothea,
Isobel Anne,
Isobel Fiona (good rhythm but perhaps aggressively Scottish?),
Isobel Susan or
Suzanne,
Isobel Ruth - anything there that appeals to you?