[name_f]Maude[/name_f] is a diminutive of [name_f]Matilda[/name_f] - what about:
[name_f]Ruth[/name_f] [name_f]Matilda[/name_f]
[name_f]Estelle[/name_f] [name_f]Matilda[/name_f]
[name_f]Ruth[/name_f] [name_f]Tilly[/name_f]
[name_f]Estelle[/name_f] [name_f]Mathilde[/name_f]
[name_f]Ruth[/name_f] [name_f]Mafalda[/name_f]
[name_f]Estelle[/name_f] [name_f]Mafalda[/name_f]
[name_m]Or[/name_m] maybe just something like [name_f]Madeleine[/name_f] or [name_m]Madigan[/name_m] that looks like it could be related because of [name_f]Maude[/name_f]?
[name_f]Ruth[/name_f] [name_f]Madeleine[/name_f]
[name_f]Ruth[/name_f] [name_m]Madigan[/name_m]
[name_f]Estelle[/name_f] [name_f]Madeleine[/name_f]
[name_f]Estelle[/name_f] [name_m]Madigan[/name_m]
I do just like Maud(e) with [name_f]Ruth[/name_f] and [name_f]Estelle[/name_f], although I do think [name_f]Ruth[/name_f] [name_f]Tilly[/name_f] or [name_f]Ruth[/name_f] [name_f]Matilda[/name_f] are my favorite options.
Good luck!