I was just curious, but I really love the name [name_f]Mabel[/name_f], but mot for a fn, rather, a nn. I was thinking about what could be a longer alternative for [name_f]Mabel[/name_f]. The only ones I could come up with were Mabelline/a. Any suggestions would be helpful thanks!
The only other one I can think of right now is [name_f]Amabel[/name_f]. [name_f]Mabel[/name_f] is a lovely name on its own 
Other than pp suggestions of [name_f]Amabel[/name_f] and your sugguestion of Mabeline/a, the only other one I can think of which may be a stretch would be [name_f]Maribel[/name_f] / [name_f]Maribella[/name_f]
In addition to [name_f]Amabel[/name_f], [name_f]Maribel[/name_f] and [name_f]Maribella[/name_f], there’s [name_f]Mariabella[/name_f], [name_f]Mirabel[/name_f]/[name_f]Mirabelle[/name_f] and [name_f]Mehitabel[/name_f]/[name_f]Mehetabel[/name_f].
I’m fond of [name_f]Amabel[/name_f], [name_f]Maribel[/name_f] and [name_f]Mirabel[/name_f] myself ^^
I love [name_f]Mirabel[/name_f]! I wouldn’t have thought of that.
Mabelline could work.
Mabelece(mabel-ece),Mabeloria(mabel-or-eea),Mabelyn, Mabelina or Mabelena, Mabelinah or Mabelynah(pron.mabel-eye-na)long I sound),Mabelorie, Mabelita
I like the name [name_f]Amabel[/name_f] best, but you could also use [name_f]Mabella[/name_f].
Mabellyn, [name_f]Maybelle[/name_f], Maybella, maybelline
I’m not sure if Amabilia has been mentioned yet.
I know you probably aren’t looking for this, but there’s also the option of getting a nn from combining the fn and mn.
FN: [name_f]Maeve[/name_f], [name_f]Maeva[/name_f], [name_f]Mabyn[/name_f], [name_f]Magdalene[/name_f], [name_f]Magdalena[/name_f], [name_f]Madeline[/name_f], [name_f]Madelief[/name_f], [name_f]Margaret[/name_f], [name_f]Marjorie[/name_f], [name_f]Magda[/name_f], [name_f]Maisie[/name_f], [name_f]Magnolia[/name_f], [name_f]Maia[/name_f]/[name_f]Maja[/name_f]/[name_f]Maya[/name_f], [name_f]Mary[/name_f], [name_f]Marie[/name_f], Marcelline, [name_f]Marcella[/name_f], [name_f]Marina[/name_f], [name_f]Mavis[/name_f], [name_f]Mariana[/name_f], [name_f]Maren[/name_f], [name_f]Marisol[/name_f],
MN: [name_f]Belle[/name_f], [name_u]Bellamy[/name_u], Bellona, Belphoebe, [name_f]Bellatrix[/name_f], [name_u]Blair[/name_u], [name_f]Blanche[/name_f], Blandine, [name_f]Blythe[/name_f], [name_f]Bluma[/name_f], [name_f]Blodwen[/name_f]
So smart! I would have never thought of that.
[name_f]Maya[/name_f] [name_f]Belle[/name_f]
[name_f]Marina[/name_f] [name_u]Bellamy[/name_u]
[name_f]Marcheline[/name_f] [name_f]Bellatrix[/name_f]