Full-length names for this nickname?

Name Advice
6

[name_m]Valentine[/name_m] / [name_m]Valentino[/name_m]
[name_m]Valerian[/name_m]
[name_m]Irving[/name_m]
[name_m]Irvine[/name_m]
[name_m]Elvin[/name_m]
[name_f]Vivian[/name_f] / [name_m]Vyvian[/name_m]
[name_m]Niven[/name_m]