Which is your vote, [name_f]Phoebe[/name_f] [name_f]Olive[/name_f] or [name_f]Phoebe[/name_f] [name_f]Elizabeth[/name_f]? 
[name_f]Phoebe[/name_f] [name_f]Olive[/name_f] sounds a bit static 2-2 syllables. IDK why, but something is off about this combo.
[name_f]Phoebe[/name_f] [name_f]Elizabeth[/name_f] is pretty, but [name_f]Elizabeth[/name_f] is so filler, and [name_f]Olive[/name_f] is so fun and spunky. Too bad there wasn’t something in between…
OH WAIT! [name_m]How[/name_m] about [name_f]Phoebe[/name_f] [name_f]Eliza[/name_f]? or [name_f]Phoebe[/name_f] [name_f]Eleanor[/name_f]?
I second @Waverly123, [name_f]Phoebe[/name_f] [name_f]Olive[/name_f] is interesting, but feels off, and [name_f]Elizabeth[/name_f] is a boring filler. [name_f]Phoebe[/name_f] [name_f]Eliza[/name_f] or [name_f]Phoebe[/name_f] [name_f]Eleanor[/name_f] would better. But if I had to choose I would pick [name_f]Phoebe[/name_f] [name_f]Elizabeth[/name_f].
[name_f]Eleanor[/name_f] does sound lovely 
I think I may have to convince my husband… ”
[name_f]Olive[/name_f] is cute, but I think [name_f]Phoebe[/name_f] [name_f]Elizabeth[/name_f] is prettier and flows better.
[name_f]Phoebe[/name_f] [name_f]Elizabeth[/name_f] is my preference, agreeing with others that [name_f]Phoebe[/name_f] [name_f]Olive[/name_f] doesn’t flow great. [name_f]Elizabeth[/name_f] is a gorgeous name; I do not consider it filler! However, I adore the suggestion of [name_f]Phoebe[/name_f] [name_f]Eliza[/name_f].
[name_f]Phoebe[/name_f] [name_f]Elizabeth[/name_f]! I agree with pp that [name_f]Elizabeth[/name_f] is not filler, it is my favorite traditional name. However, I am partial to [name_f]Phoebe[/name_f] [name_f]Eliza[/name_f]. I love [name_f]Phoebe[/name_f], and [name_f]Eliza[/name_f] is one of my ultimate favorite girls’ names. [name_f]Phoebe[/name_f] [name_f]Eliza[/name_f] gets my vote, if you are open to others than the original 2 you posted!
[name_f]Phoebe[/name_f] [name_f]Elizabeth[/name_f] or [name_f]Phoebe[/name_f] [name_f]Eliza[/name_f]. [name_m]Both[/name_m] are gorgeous!
i for one like [name_f]Phoebe[/name_f] [name_f]Elizabeth[/name_f] not [name_f]Phoebe[/name_f] [name_f]Eliza[/name_f] or [name_f]Phoebe[/name_f] [name_f]Eleanor[/name_f] i think that phoebe [name_f]Eliza[/name_f] is a little to short. [name_f]Phoebe[/name_f] and [name_f]Eleanor[/name_f] are two great names but i’m not so sure they flow as well as [name_f]Phoebe[/name_f] [name_f]Elizabeth[/name_f]. but ultimately there all good middle names.
I love [name_f]Phoebe[/name_f] [name_f]Olive[/name_f] so much! If your last name ends in a consonant go for it!
[name_f]Phoebe[/name_f] [name_f]Elizabeth[/name_f] is a great name too so whichever you choose it’s a great choice!