So I think all of these work fine, I don’t love Miyla spelling, I prefer [name_f]Mila[/name_f]? I think of these [name_f]Sienna[/name_f] and [name_f]Matea[/name_f] sound the best together. Other suggestions:
[name_f][/name_f][name_f]Sienna[/name_f] & [name_f]Mia[/name_f]
[name_f][/name_f][name_f]Sienna[/name_f] & [name_f]Calla[/name_f]
[name_f][/name_f][name_f]Sienna[/name_f] & [name_f]Malia[/name_f]
[name_f][/name_f][name_f]Sienna[/name_f] & [name_f]Iris[/name_f]
[name_f][/name_f][name_f]Sienna[/name_f] & [name_f]Laila[/name_f]
[name_f][/name_f][name_f]Sienna[/name_f] & [name_f]Audrey[/name_f]
[name_f][/name_f][name_f]Sienna[/name_f] & [name_f]Lydia[/name_f]
[name_f][/name_f][name_f]Sienna[/name_f] & [name_f]Thalia[/name_f]
[name_f][/name_f][name_f]Sienna[/name_f] & [name_f]Vivian[/name_f]
[name_f][/name_f][name_f]Sienna[/name_f] & [name_f]Elora[/name_f]
[name_f][/name_f][name_f]Sienna[/name_f] & [name_f]Lyra[/name_f]
[name_f][/name_f][name_f]Sienna[/name_f] & [name_f]Maia[/name_f]