I am quite fond of [name_f]Camille[/name_f] currently for my little lady to be, however, I am having a terrible time thinking of a good middle. I had wanted to use, [name_u]Penny[/name_u], as it is my late mother’s name, but I’m not loving the flow. Last name is 2 syllables ending in [name_m]Son[/name_m].
Other names on the short list are [name_f]Eleanor[/name_f] and [name_f]Katherine[/name_f].
Have you considered [name_f]Camille[/name_f] [name_f]Penelope[/name_f]? That could be a nod to your mothers name 
[name_f]Camille[/name_f] [name_f]Eleanor[/name_f] is nice, but it has a lot of l sounds and I’m not find of the repeating beginning sounds of [name_f]Camille[/name_f] [name_f]Katherine[/name_f].
Of the options you listed, I think [name_f]Camille[/name_f] [name_f]Eleanor[/name_f] __son flows the best. Given she will have a two syllable first and last name, I’d stick with a middle with either 1 syllable or three syllables.
Ideas:
[name_f]Camille[/name_f] [name_f]Evangeline[/name_f] __son
[name_f]Camille[/name_f] [name_f]Leanna[/name_f] __son
[name_f]Camille[/name_f] [name_f]Francesca[/name_f] __son
[name_f]Camille[/name_f] [name_f]Miranda[/name_f] __son
[name_f]Camille[/name_f] [name_f]Angelica[/name_f]
[name_f]Camille[/name_f] [name_f]Ariana[/name_f]
[name_f]Camille[/name_f] [name_f]Juliette[/name_f]
[name_f]Camille[/name_f] [name_f]Antoinette[/name_f]
[name_f]Camille[/name_f] [name_f]Juliana[/name_f]
[name_f]Camille[/name_f] [name_f]Francesca[/name_f]
[name_f]Camille[/name_f] [name_f]Isadora[/name_f]
[name_f]Camille[/name_f] [name_f]Natalia[/name_f]
[name_f]Camille[/name_f] [name_f]Antonia[/name_f]
[name_f]Camille[/name_f] [name_f]Augusta[/name_f]
[name_f]Camille[/name_f] [name_f]Rosalinda[/name_f]
[name_f]Camille[/name_f] [name_f]Amaryllis[/name_f]
[name_f]Camille[/name_f] [name_f]Eleanor[/name_f] gets my vote. [name_f]Elizabeth[/name_f] is always a great choice.
[name_f]Camille[/name_f] is one of my favs! It is hard to find middles.
[name_f]Camille[/name_f] [name_f]Eloise[/name_f]
[name_f]Camille[/name_f] [name_f]Genevieve[/name_f]
[name_f]Camille[/name_f] [name_f]Rosalie[/name_f]
[name_f]Camille[/name_f] [name_u]Penrose[/name_u]
[name_f]Camille[/name_f] [name_f]Annaliese[/name_f]
[name_f]Camille[/name_f] [name_f]Josephine[/name_f]
[name_f]Camille[/name_f] [name_f]Eloise[/name_f]
[name_f]Camille[/name_f] [name_f]Penelope[/name_f]
[name_f]Camille[/name_f] [name_f]Amelie[/name_f]
[name_f]Camille[/name_f] [name_f]Yvette[/name_f]
[name_f]Camille[/name_f] [name_f]Juliette[/name_f]
[name_f]Camille[/name_f] [name_f]Elyse[/name_f]
[name_f]Camille[/name_f] [name_f]Alice[/name_f]
[name_f]Camille[/name_f] [name_f]Genevra[/name_f]
[name_f]Camille[/name_f] [name_f]Felicity[/name_f]
[name_f]Camille[/name_f] is pretty.
[name_f]Camille[/name_f] [name_f]Louise[/name_f]
[name_f]Camille[/name_f] [name_f]Susanne[/name_f]
[name_f]Camille[/name_f] [name_f]Ivy[/name_f]
[name_f]Camille[/name_f] [name_f]Iris[/name_f]
[name_f]Camille[/name_f] [name_f]Paige[/name_f]
[name_f]Camille[/name_f] [name_u]Penna[/name_u]?