I love the name [name_f]Persephone[/name_f] but it is quite long and I feel like it would need a nickname.
What nn ideas would you use for it?
[name_u]Penny[/name_u]! [name_m]Pip[/name_m]? I kind of prefer that for a boy, but it could work for a girl. Sort of spunky. 
[name_u]Peri[/name_u] and [name_u]Percy[/name_u] are two that come to mind
Sephie or Sephy, perhaps…I like the previous suggestion of [name_u]Peri[/name_u] a lot!
I love [name_u]Peri[/name_u] and [name_m]Pip[/name_m]!
Also:
[name_f]Pippa[/name_f]
[name_f]Effie[/name_f]
[name_f]Effa[/name_f]
[name_u]Pen[/name_u]
[name_f]Honey[/name_f]
[name_f]Poppy[/name_f]
Peppa
[name_f]Posy[/name_f]
[name_f]Effie[/name_f]
Sephy
[name_f]Sosie[/name_f]
[name_u]Pepper[/name_u]
I love Persie and [name_f]Posy[/name_f] especially. Also [name_m]Pippin[/name_m]. [name_m]Pip[/name_m] and [name_u]Pepper[/name_u] are good.
My favorites are [name_u]Percy[/name_u] and [name_f]Effie[/name_f] which have been mentioned already
[name_f]Sophie[/name_f] is the general nickname.
Stephie, [name_u]Sunny[/name_u] or [name_f]Fanny[/name_f].
I always wondered if you could get [name_f]Ione[/name_f] from [name_f]Persephone[/name_f]. That’s what I would use I think, if it were me.
The two that have already been mentioned that I really like are [name_u]Pepper[/name_u] (my fave) and [name_f]Pippa[/name_f] ([name_m]Pip[/name_m]).
I really like [name_u]Percy[/name_u] for a nn, especially on a girl. [name_m]Pip[/name_m] is also adorable!
Persy would be my go to- but [name_u]Peri[/name_u] and pip are also cute!