[name_m]Just[/name_m] to add a few ideas that would keep [name_f]Cece[/name_f] as the nickname:
[name_f][/name_f][name_m]Acie[/name_m] (very similar but simpler to say and spell)
[name_f][/name_f][name_f]Alcie[/name_f]
[name_f][/name_f][name_f]Amicia[/name_f]
[name_f][/name_f][name_f]Anastacia[/name_f]
[name_f][/name_f][name_f]Anice[/name_f]
[name_f][/name_f]Anna-Lucia
[name_f][/name_f][name_f]Araceli[/name_f]
[name_f][/name_f][name_f]Arcadia[/name_f]
[name_f][/name_f][name_f]Avice[/name_f]