some ideas (some are stretchy)
[name_f][/name_f][name_f]Megara[/name_f]
[name_f][/name_f]Meganna
[name_f][/name_f][name_f]Margaret[/name_f]
[name_f][/name_f][name_f]Maggie[/name_f]
[name_f][/name_f][name_f]Nutmeg[/name_f] (guilty pleasure 
)
[name_f][/name_f][name_f]Magnolia[/name_f]
[name_f][/name_f][name_f]Magdalena[/name_f]
[name_f][/name_f][name_m]Morgan[/name_m]
[name_f][/name_f][name_f]Margery[/name_f]
[name_f][/name_f][name_f]Margot[/name_f]
[name_f][/name_f][name_f]Meghana[/name_f]
[name_f][/name_f]Magalie/Megalie
I think [name_f]Meg[/name_f] can also be a standalone name but it does sound a little nicknamey and it’s nice to have a long form to fall back on. [name_m]You[/name_m] could also try doing a double barrel/first and middle name combo to get to [name_f]Meg[/name_f], ex. [name_f]Mellie[/name_f] [name_f]Grace[/name_f]