My suggestions appear to be in order from traditional to crazy (I can’t help a little crazy, and [name]Audra[/name] is such a beautiful name to be creative with!)
[name]One[/name] syllable options (Like [name]Rose[/name], [name]Lynn[/name], [name]Leigh[/name], and your other favorites [name]Hope[/name], [name]Grace[/name] and [name]Nell[/name])
[name]Belle[/name]
[name]Bess[/name]
[name]Beth[/name]
[name]Bliss[/name]
[name]Blythe[/name]
[name]Dawn[/name]
[name]Faith[/name]
[name]Fawn[/name]
[name]Faye[/name]
[name]Fern[/name]
[name]Fleur[/name]
[name]Gail[/name]/[name]Gale[/name]
[name]Lace[/name]
[name]Lark[/name]
[name]Love[/name]
[name]Meg[/name]
[name]Mell[/name]
[name]Merle[/name]
[name]Sayre[/name]
[name]Star[/name]/[name]Starr[/name]
[name]Storm[/name]
[name]Sue[/name]
[name]Tess[/name]
[name]Vale[/name]
Other L names as alternatives to [name]Leigh[/name]:
[name]Lacey[/name]
[name]Leanne[/name]
[name]Liesl[/name]
[name]Lily[/name]
Louellen
[name]Lorraine[/name]
[name]Luanne[/name]
[name]Lucy[/name]/[name]Lucille[/name] ([name]Audra[/name] [name]Luce[/name], [name]Audra[/name] [name]Lucy[/name], and [name]Audra[/name] [name]Lucille[/name] are all utterly adorable)
Sometimes the middle is a good way to tie a sibset together, by choosing names that begin with the same letter…
[name]Faline[/name]
[name]Felice[/name]
[name]Felicity[/name]
[name]Fiona[/name]
[name]Francine[/name]
…or the same style (in your case a classic surname)…
[name]Bellamy[/name]
[name]Delaney[/name]
[name]Harper[/name]
[name]Lance[/name]
[name]Leighton[/name]
[name]Linden[/name]
[name]Marley[/name]
[name]Monet[/name]
[name]Sutton[/name]
…or if you want to get really creative, a mix of all of the above! 
[name]Farley[/name]/[name]Farleigh[/name]
Fernleigh
[name]Finley[/name]/[name]Finleigh[/name]
Good luck! You’re off to a beautiful start!