I think I’d use either E or M.
E
(1)
Mum & dad: [name_f]Ethel[/name_f] & [name_m]Ernest[/name_m] ‘Effie & Ernie’
DD1: [name_f]Edith[/name_f] ‘Edie’
DS1: [name_m]Eric[/name_m]
DS2: [name_m]Earl[/name_m]
DD2: [name_f]Enid[/name_f]
(2)
Mum: [name_f]Edith[/name_f] ‘Edie’
DD: [name_f]Eden[/name_f]
DS: [name_m]Ewan[/name_m]
(3)
Mum: [name_f]Eden[/name_f]
DD1: [name_f]Elswyth[/name_f] ‘Swift’
DD2: [name_f]Eulalia[/name_f] ‘Eula’
DD3: [name_f]Eirlys[/name_f] ‘Lissy’
DS: [name_m]Evander[/name_m] ‘Van’
(4)
Mum: [name_f]Elswyth[/name_f]
DD: [name_f]Elowen[/name_f] ‘Winnie’
DS1: [name_m]Emrys[/name_m] ‘Em’
DS2: [name_m]Elwood[/name_m] ‘Woody’
DS3: [name_m]Eben[/name_m] ‘Eb’
M (1)
Mum & Dad: [name_f]Myrtle[/name_f] & [name_m]Merlin[/name_m]
DD1: [name_f]Mavis[/name_f] ‘May’
DD2: [name_f]Minerva[/name_f] ‘Minnie’
DD3: [name_f]Majorie[/name_f] ‘Maj’
DS: [name_m]Montgomery[/name_m] ‘Monty’
(2)
Mum: [name_f]Mavis[/name_f]
DD1: [name_f]Mabel[/name_f]
DD2: [name_f]Martha[/name_f]
DD3: [name_f]Margot[/name_f]
DS: [name_m]Maxwell[/name_m]
(3)
Mum: [name_f]Mabel[/name_f]
DD1: [name_f]Marigold[/name_f] ‘Goldie’
DD2: [name_f]Matilda[/name_f] ‘Tilly’
(4)
Mum: [name_f]Marigold[/name_f] ‘Goldie’
DD1: [name_f]Maple[/name_f]
DD2: [name_m]Murphy[/name_m]
DD3: [name_f]Meadow[/name_f]
DS: [name_m]Moss[/name_m]
(5)
Mum: [name_f]Maple[/name_f]
DD1: [name_f]Morwenna[/name_f]
DD2: [name_f]Maven[/name_f]
DS: [name_m]Maximilian[/name_m]