I really like
Honor /
Honour for a girl. It is among my favorite virtue/ word names.
Honora is cute, but Honoura seems unnecessarily drawn out.
Have you read the Beauty & the Beast retelling by
Robin McKinley? In the book, Beauty's real name was
Honour and her sisters were
Grace and
Hope. Personally, having that many virtues personified in a family would be a bit much, so I would choose less word like names for the siblings.
Sibling sets:
Althea,
James &
Honour (g,b,g)
Honour,
Florence & Rodrick (g,g,b)
Beatrix,
Honour &
Milo (g,g,b)
Emrys,
Honour, &
Alaric (b,g,b)
If you did want all the siblings to have virtue names, then
Vera,
Constance,
Felicity,
Clement, and
Sage