I’m loving [name_f]Margaret[/name_f], and SO likes it too, but I can’t decide on a middle name. Here are some ideas I’ve had so far:
[name_f]Margaret[/name_f] [name_f]India[/name_f]
[name_f]Margaret[/name_f] [name_f]Olive[/name_f]
[name_f]Margaret[/name_f] [name_f]Adele[/name_f]
[name_f]Margaret[/name_f] [name_f]Iris[/name_f]
[name_f]Margaret[/name_f] [name_f]April[/name_f]
[name_f]Margaret[/name_f] [name_f]Eileen[/name_f]
[name_f]Margaret[/name_f] [name_f]Elula[/name_f]
[name_f]Margaret[/name_f] [name_u]June[/name_u]/[name_f]Jane[/name_f]
Any opinions/suggestions would be awesome!
I love [name_f]Margaret[/name_f] [name_f]Iris[/name_f]! That is by far my favorite from your list. 
My second choice would be [name_f]Margaret[/name_f] [name_f]Olive[/name_f].
Other ideas:
[name_f]Margaret[/name_f] [name_f]Alice[/name_f]
[name_f]Margaret[/name_f] [name_f]Amelia[/name_f]
[name_f]Margaret[/name_f] [name_f]Cecile[/name_f]
[name_f]Margaret[/name_f] [name_f]Eleni[/name_f]
[name_f]Margaret[/name_f] [name_f]Eve[/name_f]
[name_f]Margaret[/name_f] [name_f]Gemma[/name_f]
[name_f]Margaret[/name_f] [name_f]Lily[/name_f]
[name_f]Margaret[/name_f] [name_f]Naomi[/name_f]
[name_f]Margaret[/name_f] [name_f]Opal[/name_f]
[name_f]Margaret[/name_f] [name_u]Sage[/name_u]
[name_f]Margaret[/name_f] [name_f]Selene[/name_f]
[name_f]Margaret[/name_f] [name_f]Susannah[/name_f]
[name_f]Margaret[/name_f] [name_f]Willow[/name_f]
Good luck!
With [name_f]Margaret[/name_f] I think your best to go for something a little bit unusual, from your list I like [name_f]Margaret[/name_f] [name_u]June[/name_u], [name_f]Margaret[/name_f] [name_f]Iris[/name_f] and [name_f]Margaret[/name_f] [name_f]Elula[/name_f].
Suggestions:
[name_f]Margaret[/name_f] [name_f]Ruth[/name_f]
[name_f]Margaret[/name_f] [name_f]Rosalind[/name_f]
[name_f]Margaret[/name_f] [name_f]Faye[/name_f]
[name_f]Margaret[/name_f] [name_f]Cassia[/name_f]
[name_f]Margaret[/name_f] [name_f]Amelie[/name_f]
[name_f]Margaret[/name_f] [name_f]Ethel[/name_f]
[name_f]Margaret[/name_f] [name_f]Odessa[/name_f]
[name_f]Margaret[/name_f] [name_f]Hazel[/name_f]
[name_f]Margaret[/name_f] [name_f]Ada[/name_f]
[name_f]Margaret[/name_f] [name_f]Cecily[/name_f]
I like [name_f]Margaret[/name_f] [name_f]Adele[/name_f] the most!
Bellomy
[name_f]Amanda[/name_f]
[name_f]Caroline[/name_f]
[name_f]Elena[/name_f]
Lousia
[name_f]May[/name_f]
[name_u]June[/name_u]
Sorry for any repeats
Oh, I love [name_f]Margaret[/name_f]! I tend to like simple and shorter names with a longer name. So, how about:
[name_f]Margaret[/name_f] [name_f]Ann[/name_f]
[name_f]Margaret[/name_f] [name_f]Jane[/name_f]
[name_f]Margaret[/name_f] [name_f]Rose[/name_f]
[name_f]Margaret[/name_f] [name_f]Claire[/name_f]
[name_f]Margaret[/name_f] [name_f]Elise[/name_f]
[name_f]Margaret[/name_f] [name_f]Camille[/name_f]
I immediately thought of [name_f]Lillian[/name_f]. I like the above suggestion of [name_f]Elise[/name_f]/[name_f]Elyse[/name_f] too.
I really love [name_f]Margaret[/name_f] [name_f]Adele[/name_f]. [name_m]How[/name_m] about going a step further with [name_f]Margaret[/name_f] [name_f]Adela[/name_f]?
Other than that I really like [name_f]Margaret[/name_f] [name_f]Eileen[/name_f] & [name_f]Margaret[/name_f] [name_f]Iris[/name_f].
I like [name_f]Margaret[/name_f] [name_f]Jane[/name_f].
Here is some suggestions:
[name_f]Margaret[/name_f] [name_f]Louise[/name_f]
[name_f]Margaret[/name_f] [name_f]Anne[/name_f]
[name_f]Margaret[/name_f] [name_f]Rose[/name_f]
I really like [name_f]Margaret[/name_f] [name_f]Indira[/name_f], [name_f]Margaret[/name_f] [name_f]Julia[/name_f], [name_f]Margaret[/name_f] [name_f]Louisa[/name_f] and [name_f]Margaret[/name_f] [name_f]Olive[/name_f] for you.
([name_f]Indira[/name_f] vs. [name_f]India[/name_f])
[name_f]Margaret[/name_f] [name_f]Adele[/name_f] is my favorite.
My great-aunt (born 1916) was a [name_f]Margaret[/name_f] [name_f]Lillian[/name_f], and it holds up well almost 100 years on.
But, I do also like shorter or sharper sounds:
[name_f]Margaret[/name_f] [name_u]Wren[/name_u]
[name_f]Margaret[/name_f] [name_u]Alix[/name_u]
[name_f]Margaret[/name_f] [name_f]Beatrix[/name_f]
Or longer or softer ones:
[name_f]Margaret[/name_f] [name_f]Sybella[/name_f]
[name_f]Margaret[/name_f] [name_f]Annika[/name_f]
[name_f]Margaret[/name_f] [name_f]Lucia[/name_f]
[name_f]Margaret[/name_f] Aleida
Sorry for any repeats.
[name_f]Margaret[/name_f] [name_f]Irene[/name_f]
[name_f]Margaret[/name_f] [name_f]Elise[/name_f]
[name_f]Margaret[/name_f] [name_f]Rhiannon[/name_f]
[name_f]Margaret[/name_f] [name_f]Sophia[/name_f]
[name_f]Margaret[/name_f] [name_f]Delphine[/name_f]
[name_f]Margaret[/name_f] [name_f]Aurora[/name_f]
[name_f]Margaret[/name_f] [name_f]Rosalind[/name_f]
[name_f]Margaret[/name_f] [name_f]Ophelia[/name_f]
[name_f]Margaret[/name_f] [name_f]Kathleen[/name_f]
[name_f]Margaret[/name_f] [name_f]Danielle[/name_f]
[name_f]Margaret[/name_f] [name_f]Elena[/name_f]
[name_f]Margaret[/name_f] [name_f]Isabel[/name_f]
Wow! Thanks for all the feedback.
I absolutely love [name_f]Margaret[/name_f] [name_f]Lillian[/name_f], and I think my SO would like it too!
I also like [name_f]Margaret[/name_f] [name_f]Eve[/name_f], [name_f]Margaret[/name_f] [name_f]Hazel[/name_f], [name_f]Margaret[/name_f] [name_f]Adela[/name_f], [name_f]Margaret[/name_f] [name_f]Louise[/name_f], [name_f]Margaret[/name_f] [name_f]Annika[/name_f], [name_f]Margaret[/name_f] [name_f]Ophelia[/name_f].
There’s something very sweet about [name_f]Margaret[/name_f] [name_f]April[/name_f].
Other suggestions:
[name_f]Margaret[/name_f] [name_u]June[/name_u]
[name_f]Margaret[/name_f] [name_f]Ashling[/name_f]
[name_f]Margaret[/name_f] [name_f]Pearl[/name_f]
[name_f]Margaret[/name_f] [name_f]Esther[/name_f]
[name_f]Margaret[/name_f] [name_f]Sylvie[/name_f]
[name_f]Margaret[/name_f] [name_f]Willow[/name_f]
[name_f]Margaret[/name_f] [name_f]Ivy[/name_f]
[name_f]Margaret[/name_f] [name_f]Alice[/name_f]
[name_f]Margaret[/name_f] [name_u]Linden[/name_u]
[name_f]Margaret[/name_f] [name_f]Primrose[/name_f]
[name_f]Margaret[/name_f] [name_f]Judith[/name_f]
[name_f]Margaret[/name_f] [name_f]Melody[/name_f]
[name_f]Margaret[/name_f] [name_f]Elspeth[/name_f]
[name_f]Margaret[/name_f] [name_f]Elena[/name_f]
[name_f]Margaret[/name_f] [name_f]Helena[/name_f]
[name_f]Margaret[/name_f] [name_f]Joanna[/name_f]
[name_f]Margaret[/name_f] [name_f]Josephine[/name_f]
[name_f]Margaret[/name_f] [name_f]Felicia[/name_f]
Great name! 
I love [name_f]Margaret[/name_f] [name_f]Adele[/name_f] and [name_f]Margaret[/name_f] [name_u]June[/name_u] from your options. Some other ideas:
[name_f]Margaret[/name_f] [name_f]Athena[/name_f]
[name_f]Margaret[/name_f] [name_f]Camille[/name_f]
[name_f]Margaret[/name_f] [name_f]Corinne[/name_f]
[name_f]Margaret[/name_f] [name_f]Nadine[/name_f]
[name_f]Margaret[/name_f] [name_f]India[/name_f] - Not bad, but the flow isn’t the best because they both have the same stress and number of syllables.
[name_f]Margaret[/name_f] [name_f]Olive[/name_f] - Fine. I like it.
[name_f]Margaret[/name_f] [name_f]Adele[/name_f] - Fine. I really like this.
[name_f]Margaret[/name_f] [name_f]Iris[/name_f] - Fine, though the flow’s not as good as some of your combos.
[name_f]Margaret[/name_f] [name_f]April[/name_f] - Fine, though as with [name_f]Margaret[/name_f] [name_f]Iris[/name_f] the flow’s not that great.
[name_f]Margaret[/name_f] [name_f]Eileen[/name_f] - Fine. I don’t usually like [name_f]Eileen[/name_f], but I like the combo.
[name_f]Margaret[/name_f] [name_f]Elula[/name_f] - Fine. I quite like this.
[name_f]Margaret[/name_f] [name_u]June[/name_u]/[name_f]Jane[/name_f] - Fine
Some more ideas:
[name_f]Margaret[/name_f] [name_f]Indira[/name_f]
[name_f]Margaret[/name_f] [name_f]Geneva[/name_f]
[name_f]Margaret[/name_f] [name_f]Irena[/name_f]
[name_f]Margaret[/name_f] [name_f]Elena[/name_f]
[name_f]Margaret[/name_f] [name_f]Alina[/name_f]
[name_f]Margaret[/name_f] [name_f]Carina[/name_f]
[name_f]Margaret[/name_f] [name_u]Ruby[/name_u]
[name_f]Margaret[/name_f] [name_f]Eva[/name_f]
[name_f]Margaret[/name_f] [name_u]River[/name_u]
[name_f]Margaret[/name_f] [name_f]Lola[/name_f]
[name_f]Margaret[/name_f] [name_f]Matilda[/name_f]
[name_f]Margaret[/name_f] [name_f]Cordelia[/name_f]
[name_f]Margaret[/name_f] [name_f]Lux[/name_f]
[name_f]Margaret[/name_f] [name_f]Louisa[/name_f]
[name_f]Margaret[/name_f] [name_f]Luna[/name_f]
[name_f]Margaret[/name_f] [name_f]Lula[/name_f]
[name_f]Margaret[/name_f] [name_f]Eulalie[/name_f]
[name_f]Margaret[/name_f] [name_f]Ophelie[/name_f]
[name_f]Margaret[/name_f] [name_u]Skye[/name_u]
[name_f]Margaret[/name_f] [name_u]Story[/name_u]
[name_f]Margaret[/name_f] [name_f]Adela[/name_f]
[name_f]Margaret[/name_f] [name_f]Esther[/name_f]
[name_f]Margaret[/name_f] [name_f]Daphne[/name_f]
[name_f]Margaret[/name_f] [name_f]Eliza[/name_f]
[name_f]Margaret[/name_f] [name_f]Bianca[/name_f]
[name_f]Margaret[/name_f] [name_f]May[/name_f]
[name_f]Margaret[/name_f] [name_f]Faye[/name_f]
[name_f]Margaret[/name_f] [name_u]Lane[/name_u]
[name_f]Margaret[/name_f] [name_f]Elaine[/name_f]
[name_f]Margaret[/name_f] [name_f]October[/name_f]
[name_f]Margaret[/name_f] [name_f]Katrina[/name_f]/[name_f]Catriona[/name_f]
[name_f]Margaret[/name_f] [name_f]Louise[/name_f]
[name_f]Margaret[/name_f] [name_f]Elspeth[/name_f]
[name_f]Margaret[/name_f] [name_f]Jane[/name_f] is classic and lovely and [name_f]Lillian[/name_f] as suggested goes nicely too. I also like [name_f]Margaret[/name_f] [name_f]Elaine[/name_f] or [name_f]Margaret[/name_f] [name_f]Anne[/name_f].