Top choices for you are [name_u]Ruby[/name_u], [name_f]Willa[/name_f] or [name_f]Pearl[/name_f]. I like that [name_f]Willa[/name_f] and [name_f]Pearl[/name_f] would share an “l” with all of their siblings.
I like [name_f]Daphne[/name_f] and [name_f]Willa[/name_f] best.
These are all so lovely. The only ones I don’t [name_f]ADORE[/name_f] are [name_f]Greta[/name_f] and [name_u]Penny[/name_u]. Great sounds sort of mean to me and [name_u]Penny[/name_u] sounds a little like a puppy name!
I voted [name_f]Daphne[/name_f] but it was so hard to choose! I would say [name_f]Cecelia[/name_f] but I thought it was a lot of “s” sound with your last name. 
My top choice is [name_f]Willa[/name_f] followed by [name_f]Daphne[/name_f], [name_u]Ruby[/name_u], [name_f]Lucy[/name_f], and [name_f]Greta[/name_f]. I wouldn’t use [name_f]Pearl[/name_f] because it’s so close to [name_f]Hazel[/name_f]. [name_f]Rose[/name_f] is nice, but I like the 2 syllable count for the other names and would carry that through here. [name_f]Cecelia[/name_f] is a great name, but again, I’d stick to the 2 syllable names. I like [name_u]Penny[/name_u], but it seems more like a nn to me. [name_f]Ava[/name_f] seems too common, but would you consider [name_f]Avis[/name_f] or [name_f]Mavis[/name_f]? I think they work well.