These are fun and imaginative ideas. I’ve always thought [name_f]Cricket[/name_f] was a cool nickname.
[name_m]Victory[/name_m] → Crickey → [name_f]Cricket[/name_f]
The only one of the suggestions I can’t get behind is [name_m]Theodore[/name_m] → [name_m]Thor[/name_m]. I’ve always associated [name_m]Theodore[/name_m] with “gift of [the one true] God”. So to stick a mythological god’s name in as a nickname takes a lot away from the meaning.
[name_f]Love[/name_f]
[name_f]Lottie[/name_f] for [name_f]Violet[/name_f]
[name_f]Lainey[/name_f] for [name_f]Madeleine[/name_f]
[name_f]Malu[/name_f] or [name_f]Mali[/name_f] for [name_f]María[/name_f] [name_f]Luisa[/name_f]
and
[name_m]Neil[/name_m] for [name_m]Nathaniel[/name_m]