Love all of those names.
I like [name_f]Isla[/name_f] [name_f]Rose[/name_f] best from your favourites (and I don’t find [name_f]Isla[/name_f] ‘lacking’ at all - she’s gorgeous).
[name_m]Just[/name_m] a few other ideas:
[name_f]Emma[/name_f]
[name_f]Maya[/name_f]
[name_f]Zara[/name_f]
[name_u]Eden[/name_u]
[name_f]Lola[/name_f]
[name_f]Sophia[/name_f]
[name_f]Anya[/name_f]
[name_u]Ruby[/name_u]
[name_f]Georgia[/name_f]
[name_f]Willa[/name_f]
[name_f]Eva[/name_f]
[name_f]Freya[/name_f]
[name_f]Charlotte[/name_f]
[name_f]Violet[/name_f]
[name_f]Ivy[/name_f]
[name_f]Clara[/name_f]
[name_f]Mia[/name_f]
[name_f]Lily[/name_f]
[name_f]May[/name_f]
[name_f]Nora[/name_f]
[name_f]Luna[/name_f]
[name_f]Hannah[/name_f]
[name_f]Poppy[/name_f]
[name_f]Kate[/name_f]
[name_f]Lucy[/name_f]
[name_f]Cora[/name_f]
[name_f]Scarlett[/name_f]
[name_f]Iris[/name_f]
I think that [name_f]Olivia[/name_f] [name_f]Rose[/name_f] is 
The first ones I thought of after reading your post were [name_f]Harlow[/name_f] [name_f]Rose[/name_f], [name_f]Marina[/name_f] [name_f]Rose[/name_f], and [name_f]Eliza[/name_f] [name_f]Rose[/name_f].
Here are some other ideas:
[name_u]Ayden[/name_u], [name_m]Asher[/name_m], and…
• Allerie, [name_f]Briar[/name_f] 
[name_f]Camille[/name_f], [name_f]Delilah[/name_f], [name_u]Eloise[/name_u], [name_f]Freya[/name_f], [name_f]Flora[/name_f], [name_f]Hazel[/name_f], [name_f]Heather[/name_f], [name_f]Iris[/name_f], [name_f]Mallory[/name_f], [name_u]Marlow[/name_u], [name_f]Naomi[/name_f], [name_f]Scarlet[/name_f], [name_f]Stella[/name_f], and [name_f]Savanna[/name_f] [name_f]Rose[/name_f] •
Sorry for the long list, hope this helps
Both [name_f]Olivia[/name_f] and [name_f]Isla[/name_f] are gorgeous!! Both [name_f]Olivia[/name_f] [name_f]Rose[/name_f] and [name_f]Isla[/name_f] [name_f]Rose[/name_f] are beautiful!! I slightly prefer [name_u]Ayden[/name_u], [name_m]Asher[/name_m] and [name_f]Isla[/name_f] though :).
Here’s a few ideas…
[name_u]Ayden[/name_u], [name_m]Asher[/name_m] and [name_f]Tessa[/name_f] [name_f]Rose[/name_f]
[name_u]Ayden[/name_u], [name_m]Asher[/name_m] and [name_f]Mila[/name_f] [name_f]Rose[/name_f]
[name_u]Ayden[/name_u], [name_m]Asher[/name_m] and [name_f]Amelie[/name_f] [name_f]Rose[/name_f]
[name_u]Ayden[/name_u], [name_m]Asher[/name_m] and [name_f]Felicity[/name_f] [name_f]Rose[/name_f]
[name_u]Ayden[/name_u], [name_m]Asher[/name_m] and [name_f]Nora[/name_f] [name_f]Rose[/name_f]
[name_u]Ayden[/name_u], [name_m]Asher[/name_m] and [name_f]Eva[/name_f] [name_f]Rose[/name_f]
[name_u]Ayden[/name_u], [name_m]Asher[/name_m] and [name_u]Ruby[/name_u] [name_f]Rose[/name_f]
[name_u]Ayden[/name_u], [name_m]Asher[/name_m] and [name_f]Lila[/name_f] [name_f]Rose[/name_f]
[name_u]Ayden[/name_u], [name_m]Asher[/name_m] and [name_f]Stella[/name_f] [name_f]Rose[/name_f]
[name_u]Ayden[/name_u], [name_m]Asher[/name_m] and [name_f]Elodie[/name_f] [name_f]Rose[/name_f]
[name_u]Ayden[/name_u], [name_m]Asher[/name_m] and [name_f]Summer[/name_f] [name_f]Rose[/name_f]
[name_u]Ayden[/name_u], [name_m]Asher[/name_m] and [name_u]Darby[/name_u] [name_f]Rose[/name_f]
[name_u]Ayden[/name_u], [name_m]Asher[/name_m] and [name_f]Maia[/name_f] [name_f]Rose[/name_f]
[name_u]Ayden[/name_u], [name_m]Asher[/name_m] and [name_f]Ellie[/name_f] [name_f]Rose[/name_f]
[name_u]Ayden[/name_u], [name_m]Asher[/name_m] and [name_f]Nya[/name_f] [name_f]Rose[/name_f]
[name_u]Ayden[/name_u], [name_m]Asher[/name_m] and [name_f]Julia[/name_f] [name_f]Rose[/name_f]
[name_u]Ayden[/name_u], [name_m]Asher[/name_m] and [name_f]Leah[/name_f] [name_f]Rose[/name_f]
[name_u]Ayden[/name_u], [name_m]Asher[/name_m] and [name_f]Della[/name_f] [name_f]Rose[/name_f]
I like [name_f]Isla[/name_f] [name_f]Rose[/name_f], too. [name_f]Olivia[/name_f] [name_f]Rose[/name_f] is adorable, too. If it doesn’t they don’t feel right, I suggest using [name_f]Aili[/name_f]. I know someone named [name_f]Aili[/name_f] (pronounced eye-lee). [name_f]Aili[/name_f] [name_f]Rose[/name_f]? I like [name_f]Alivia[/name_f] [name_f]Rose[/name_f], too.
[name_f]Iris[/name_f] [name_f]Rose[/name_f]
[name_f]Ines[/name_f] [name_f]Rose[/name_f]
[name_f]Iva[/name_f] [name_f]Rose[/name_f]
[name_f]Inez[/name_f] [name_f]Rose[/name_f]
[name_f]Ayla[/name_f] [name_f]Rose[/name_f]
[name_f]Eileen[/name_f] [name_f]Rose[/name_f]
[name_f]Irena[/name_f] [name_f]Rose[/name_f]
[name_f]Oliva[/name_f] [name_f]Rosemary[/name_f]
[name_f]Isla[/name_f] [name_f]Rosemary[/name_f]
[name_f]Isla[/name_f] [name_u]Rosario[/name_u]
I hope you will keep [name_f]Rose[/name_f] to honor your family member.
Thank you for the suggestions. I appreciate it.