Full names for the nicknames Sephi/Sephi?

[name_m]Hi[/name_m], can you think of any names that could have the nicknames Seph/[name_m]Seff[/name_m] or Sephi/Seffi?
So far I’ve come up with [name_m]Joseph[/name_m], [name_f]Josephine[/name_f] and [name_f]Persephone[/name_f], but not keen on any of them

All I can think of are [name_f]Seraphina[/name_f]/[name_f]Seraphine[/name_f] and [name_f]Sephira[/name_f]. There’s also several international variants of [name_m]Joseph[/name_m] you could use. The only other alternative I can think of is combining elements from a first and middle to get the nickname you want, like Selah Phaedra = Seph(ie)

[name_m]Steffan[/name_m]/[name_m]Stefan[/name_m]
[name_m]Aleph[/name_m]
[name_m]Sebastian[/name_m] (possibly)
[name_f]Stephanie[/name_f]
[name_m]Ephraim[/name_m]
[name_f]Sapphire[/name_f]/[name_f]Sapphira[/name_f]

I personally wouldn’t use them but there’s also [name_f]Sephora[/name_f]/Séphora and Sefton.
But I think your best bet is the ‘S’ first name and middle name with the ‘eff’ sound in it type thing as suggested by pp

[name_f]Saffron[/name_f]
[name_f]Sapphire[/name_f]
[name_f]Seraphina[/name_f]
[name_f]Stephanie[/name_f]
?