Not sure if this is exactly what you meant but I’ve given it my best shot 
[name]Mona[/name] - [name]Ramona[/name], [name]Desdemona[/name]
[name]Lois[/name] - [name]Eloise[/name], [name]Eloisa[/name], [name]Aloisa[/name], [name]Heloise[/name]
[name]Mabel[/name] - [name]Amabel[/name]
[name]Aria[/name] - [name]Ariana[/name], [name]Arianna[/name], [name]Arianne[/name], [name]Arianwen[/name], [name]Ariadne[/name]
[name]Lia[/name]/[name]Lea[/name] - [name]Aurelia[/name], [name]Ophelia[/name], [name]Bidelia[/name], [name]Camellia[/name], [name]Azalea[/name]
[name]Ava[/name] - [name]Avalon[/name]
[name]Io[/name] - [name]Calliope[/name], [name]Hermione[/name]
[name]Maris[/name] - [name]Damaris[/name]
[name]Amari[/name] - [name]Damaris[/name]
[name]Eva[/name] - [name]Evangeline[/name], [name]Evanna[/name], [name]Evanthe[/name], [name]Evadne[/name]
[name]Lina[/name] - [name]Carolina[/name], [name]Angelina[/name], [name]Evangelina[/name]
[name]Celia[/name] - [name]Cecelia[/name]
[name]Delia[/name] - [name]Cordelia[/name]
[name]Ember[/name] - [name]December[/name], [name]November[/name], [name]Remember[/name] (very wordy!)
[name]Nora[/name] - [name]Elenora[/name], [name]Eleonora[/name], [name]Eleanora[/name], [name]Leonora[/name], [name]Lenora[/name], [name]Honora[/name], [name]Annora[/name]
[name]Esme[/name] - [name]Esmeralda[/name]
[name]Nola[/name] - [name]Finola[/name]
[name]Nell[/name] - [name]Fenella[/name], [name]Petronella[/name]
[name]Erica[/name] - [name]Frederica[/name], [name]Federica[/name]
[name]Mia[/name] - [name]Euphemia[/name]
[name]Diana[/name] - [name]Indiana[/name]
[name]Giana[/name] - [name]Georgiana[/name]
[name]Dana[/name] - [name]Jordana[/name]
[name]Elisa[/name] - [name]Melisande[/name]
[name]Ever[/name] - [name]Guinevere[/name]
[name]Mira[/name] - [name]Mirabel[/name], [name]Mirabelle[/name], [name]Mirabella[/name]
[name]Tessa[/name] - [name]Quintessa[/name]
[name]Lula[/name] - [name]Tallulah[/name]
[name]Tiana[/name] - [name]Tatiana[/name]
[name]Ian[/name] - [name]Aurelian[/name], [name]Octavian[/name], [name]Dorian[/name], [name]Caspian[/name], [name]Cassian[/name], [name]Lucian[/name], [name]Damian[/name], [name]Christian[/name], [name]Fabian[/name], [name]Finnian[/name], [name]Florian[/name], H/[name]Adrian[/name], [name]Julian[/name], [name]Maximilian[/name]
[name]Carl[/name] - [name]Carlisle[/name]
[name]Ash[/name] - [name]Dashiell[/name]
[name]Evan[/name] - [name]Evander[/name]
[name]Rick[/name] - [name]Frederick[/name], [name]Broderick[/name], [name]Patrick[/name]
[name]Ander[/name]/s - [name]Lysander[/name]
[name]Hope[/name] this is the sort of thing you were looking for
I think that some of these could make really cool and unexpected nns. I would love to see [name]Calliope[/name] or [name]Hermione[/name] nn [name]Io[/name].