Besides [name]Elizabeth[/name].
Hmm…well, for [name]Effy[/name] I have:
[name]Stephanie[/name]
[name]Felicity[/name] (might be a bit of a stretch)
[name]Fiona[/name]
[name]Josephine[/name]/[name]Josefina[/name]
[name]Seraphina[/name]
[name]Daphne[/name]
[name]Persephone[/name]
Sorry, I can’t really think of anything for [name]Buffy[/name] 
[name]EFFIE[/name]:
[name]Hephzibah[/name] – Bible name that also offers the nickname [name]Eppie[/name] as used in the classic novel [name]Silas[/name] Marner.
[name]Elspeth[/name]
[name]Stefania[/name]
No ideas on [name]Buffy[/name]. Sorry!
For [name]Effie[/name] I like [name]Delphia[/name] and [name]Ophelia[/name]
For [name]Buffy[/name]… Bellefleur or Blanchefleur?
[name]Josephine[/name] or a name with the initials F. E. [name]Frances[/name]?
I am guessing that [name]Euphemia[/name] is too out there for you? That is where the nickname [name]Effie[/name] comes from. There is also [name]Iphigenia[/name].
Maybe [name]Barbara[/name] could have the nn [name]Buffy[/name]?
There is a Native singer from [name]Canada[/name] named [name]Buffy[/name] Sainte-[name]Marie[/name] and her birth name was [name]Beverly[/name].
[name]Effy[/name] could be a nickname for [name]Sefarina[/name].
Sephira
It’s pretty out there but I think Buffalo nn [name]Buffy[/name] is adorable!!
I knew a little girl called [name]Zephyr[/name]. NN [name]Ephie[/name]/[name]Effie[/name]. Seems a little out there for a girl but she really suited it!
Thanks everyone, loving the idea of [name]Josephine[/name], [name]Seraphina[/name], [name]Persephone[/name], [name]Elspeth[/name], [name]Ophelia[/name], [name]Euphemia[/name] (though this is a middle name only name for me, however I do love it) and [name]Iphigenia[/name].