I’ve always had [name]Ophelia[/name] on my list but I also really like [name]Phillip[/name] lately and I was wondering if they sound too close. They both have a heavy F sound, but I don’t know if that makes them too matchy or not. The nn’s would be [name]Effie[/name] and [name]Pip[/name].
I don’t think so. I really like the sibset. And a lot of the time they go by their nicknames.
They are close, but not too close [name]IMO[/name]. [name]Both[/name] are great names! 
I don’t think they are too close at all. Didn’t even notice they were close actually.
Those are cute together! They also have an “l” sound in common, but I think it helps unify the combo.
I really like this combo — the strong O sound in [name]Ophelia[/name] dominates the name to make it different enough from [name]Philip[/name].
[name]Effie[/name] and [name]Pip[/name] are nothing alike, so I think you’re okay. They’re similar, but not enough for everyone to notice.