Simple enough - just roll once for the first name themes & again for the middle names. Use the same themes for all siblings 
http://www.bgfl.org/bgfl/custom/resources_ftp/client_ftp/ks1/maths/dice/twelve.htm
DS
DS/DS
DD
DD
DD
DS
DS
DD/DD/DD
MUSICAL & AUTHORS
Chord [name_m]William[/name_m]
[name_m]Lennon[/name_m] [name_m]Scott[/name_m] & [name_u]Jude[/name_u] [name_m]Fitzgerald[/name_m]
[name_f]Cadence[/name_f] [name_f]Mary[/name_f]
[name_f]Allegra[/name_f] [name_f]Bronte[/name_f]
[name_u]Fifer[/name_u] [name_f]Jane[/name_f]
[name_u]Alto[/name_u] [name_m]Hemingway[/name_m]
[name_u]Reed[/name_u] Orwell
[name_u]Lyric[/name_u] [name_f]Mallory[/name_f], [name_f]Aria[/name_f] [name_u]Joyce[/name_u] & [name_f]Minuet[/name_f] [name_u]Harper[/name_u]
Nature/ Classic
[name_m]Maverick[/name_m] [name_m]William[/name_m]
[name_u]Bay[/name_u] [name_m]Jackson[/name_m] &[name_u]River[/name_u] [name_m]Edward[/name_m]
[name_f]Magnolia[/name_f] [name_f]Charlotte[/name_f]
[name_f]Ivy[/name_f] [name_f]Samantha[/name_f]
[name_f]Calla[/name_f] [name_f]Julia[/name_f]
[name_m]Fox[/name_m] [name_m]Charles[/name_m]
[name_m]Ridge[/name_m] [name_u]Hunter[/name_u]
[name_f]Arbor[/name_f] [name_f]Isabella[/name_f] & [name_u]Rain[/name_u] [name_u]Blair[/name_u] & [name_f]Briar[/name_f] [name_f]Elizabeth[/name_f]
classic and surnames
DS: [name_m]Alexander[/name_m] [name_m]Wilson[/name_m]
DS/DS: [name_u]James[/name_u] [name_m]Cohen[/name_m]/[name_m]John[/name_m] [name_u]Curran[/name_u]
DD: [name_f]Isabel[/name_f] [name_u]Wylie[/name_u]
DD: [name_f]Laura[/name_f] [name_u]Jensen[/name_u]
DD: [name_f]Sophia[/name_f] [name_u]Brinsley[/name_u]
DS: [name_u]Michael[/name_u] [name_u]Brady[/name_u]
DS: [name_m]Thomas[/name_m] [name_m]Harrison[/name_m]
DD/DD/DD: [name_f]Catherine[/name_f] [name_u]Marley[/name_u]/[name_f]Elizabeth[/name_f] [name_u]Seeley[/name_u]/[name_f]Margaret[/name_f] [name_u]Tierney[/name_u]
DS: [name_m]Austin[/name_m] [name_m]Louie[/name_m]
DS/DS: [name_u]Hudson[/name_u] [name_u]Beck[/name_u] & [name_u]Denver[/name_u] [name_u]Charlie[/name_u]
DD: [name_u]Brooklyn[/name_u] [name_u]Josie[/name_u]
DD: [name_u]Madison[/name_u] [name_f]Evie[/name_f]
DD: [name_f]Georgia[/name_f] [name_u]Lou[/name_u]
DS: [name_u]Dakota[/name_u] [name_m]Nate[/name_m]
DS: [name_u]Camden[/name_u] [name_m]Eli[/name_m]
DD/DD/DD: [name_u]Paris[/name_u] [name_f]Emmy[/name_f], [name_f]Savannah[/name_f] [name_u]Abbey[/name_u] & [name_f]Adelaide[/name_f] [name_f]Minnie[/name_f]
[name_m]Huckleberry[/name_m] [name_m]Austin[/name_m] [name_m]Huck[/name_m]
[name_m]Emmerich[/name_m] [name_m]Oscar[/name_m] & [name_m]Benno[/name_m] [name_u]Channing[/name_u]
[name_u]Flannery[/name_u] [name_f]Bronte[/name_f]
[name_u]Collins[/name_u] [name_f]Cornelia[/name_f]
[name_u]Echo[/name_u] [name_f]Sadie[/name_f]
[name_m]Tennyson[/name_m] [name_m]Wolf[/name_m]
[name_u]Nico[/name_u] [name_u]Leaf[/name_u]
[name_f]Alba[/name_f] [name_f]Mary[/name_f] & [name_f]Arabesque[/name_f] [name_f]Olivia[/name_f] & Alodia [name_f]Catherine[/name_f]
FN’s are nicknames and MN’s all begin with vowels.
DS: [name_m]Theo[/name_m] [name_m]Asher[/name_m]
DS/DS: [name_m]Nate[/name_m] [name_m]Everett[/name_m] / [name_m]Nico[/name_m] [name_m]Emett[/name_m]
DD: [name_f]Gabby[/name_f] [name_f]Amelia[/name_f]
DD: [name_f]Evie[/name_f] [name_f]Ariadne[/name_f]
DD: [name_f]Tess[/name_f] [name_f]Aveline[/name_f]
DS: [name_m]Kit[/name_m] [name_m]Ethan[/name_m]
DS: [name_m]Sam[/name_m] [name_m]Oliver[/name_m]
DD/DD/DD: [name_f]Pippa[/name_f] [name_f]Alma[/name_f] / [name_f]Liv[/name_f] [name_f]Avalon[/name_f] / [name_f]Penny[/name_f] [name_f]Addison[/name_f]
Nature and Celebrities
[name_u]Roan[/name_u] [name_m]William[/name_m]
[name_u]Orion[/name_u] [name_m]Matthew[/name_m]
[name_m]Leo[/name_m] [name_m]Benedict[/name_m]
[name_f]Ivy[/name_f] [name_f]Elizabeth[/name_f]
[name_f]Violet[/name_f] [name_f]Nichelle[/name_f]
[name_f]Hazel[/name_f] [name_f]Keira[/name_f]
[name_u]River[/name_u] [name_m]Anthony[/name_m]
[name_u]Reed[/name_u] [name_m]Leonard[/name_m]
[name_u]Juniper[/name_u] [name_f]Felicia[/name_f]
[name_f]Linnea[/name_f] [name_f]Audrey[/name_f]
[name_u]Ember[/name_u] [name_f]Katherine[/name_f]
DS: [name_m]William[/name_m] [name_m]Arron[/name_m]
DS/DS: [name_m]Joseph[/name_m] [name_m]Austin[/name_m] & [name_m]Edward[/name_m] [name_m]Caspian[/name_m]
DD: [name_f]Emmeline[/name_f] [name_f]Georgia[/name_f]
DD: [name_f]Isobel[/name_f] [name_u]Albany[/name_u]
DD: [name_f]Magdalena[/name_f] [name_f]Florence[/name_f]
DS: [name_m]Daniel[/name_m] [name_f]Harlow[/name_f]
DS: [name_m]Charles[/name_m] [name_m]Indio[/name_m]
DD/DD/DD: [name_f]Katrina[/name_f] [name_f]Savannah[/name_f] & [name_f]Naomi[/name_f] [name_f]Adelaide[/name_f] & [name_f]Lydia[/name_f] [name_f]Carolina[/name_f]
Surnames & vowels
[name_u]Flynn[/name_u] [name_m]Oliver[/name_m]
[name_u]Jameson[/name_u] [name_u]Elliott[/name_u] & [name_m]Cooper[/name_m] [name_u]Arlo[/name_u]
[name_u]Blair[/name_u] [name_f]Elizabeth[/name_f]
[name_u]Kennedy[/name_u] [name_f]Isobel[/name_f]
[name_f]Winslet[/name_f] [name_f]Eve[/name_f]
[name_u]Spencer[/name_u] [name_m]Abraham[/name_m]
[name_u]Riley[/name_u] [name_m]Arthur[/name_m]
[name_f]Jolie[/name_f] [name_f]Adelaide[/name_f], [name_u]Carey[/name_u] [name_f]Imogen[/name_f] & [name_u]Monroe[/name_u] [name_f]Avia[/name_f]
unisex & places
[name_u]Hayden[/name_u] [name_m]Rome[/name_m]
[name_u]Spencer[/name_u] [name_m]Austin[/name_m] & [name_u]Finlay[/name_u] [name_m]Preston[/name_m]
[name_u]Blair[/name_u] [name_f]Valencia[/name_f]
[name_u]Evelyn[/name_u] [name_f]Georgia[/name_f]
[name_u]Sage[/name_u] [name_u]Indiana[/name_u]
[name_u]Elliot[/name_u] [name_f]Scotland[/name_f]
[name_u]Kai[/name_u] [name_u]Denver[/name_u]
[name_u]Quinn[/name_u] [name_f]Adelaide[/name_f], [name_u]Reese[/name_u] [name_f]Savannah[/name_f] & [name_u]Avery[/name_u] [name_u]Paris[/name_u]
Nature • Vintage
DS: [name_m]Bram[/name_m] [name_m]Virgil[/name_m]
DS/DS: Kestrel [name_u]Maurice[/name_u] & [name_m]Peregrine[/name_m] [name_m]Arnold[/name_m]
DD: [name_f]Delta[/name_f] [name_f]Gertrude[/name_f]
DD: [name_f]Ebba[/name_f] [name_f]Marjorie[/name_f]
DD: [name_f]Ondine[/name_f] [name_f]Ethel[/name_f]
DS: [name_m]Adler[/name_m] [name_u]Roy[/name_u]
DS: Cygnus [name_m]Abraham[/name_m]
DD/DD/DD: [name_f]Genevieve[/name_f] [name_f]Essie[/name_f], [name_f]Thalassa[/name_f] [name_f]Lottie[/name_f], & [name_f]Morgaine[/name_f] [name_f]Goldie[/name_f]
All the boys have bird names and all the girls have water-related names. I wasn’t sure what constitutes vintage versus classic names so I raided top 200 lists from the late 1800s for names I don’t really hear anymore.
Nature & Places
DS: [name_m]Huckleberry[/name_m] [name_u]Camden[/name_u] ‘[name_m]Huck[/name_m]’
DS/DS: [name_u]River[/name_u] [name_m]Charleston[/name_m] & [name_m]Fox[/name_m] [name_m]Santiago[/name_m]
DD: [name_f]Calla[/name_f] [name_f]Sicily[/name_f]
DD: [name_f]Primrose[/name_f] [name_f]Olympia[/name_f] ‘[name_f]Rose[/name_f]’
DD: [name_f]Alouette[/name_f] [name_f]India[/name_f]
DS: [name_m]Sylvan[/name_m] [name_u]Dakota[/name_u]
DS: [name_m]Bear[/name_m] [name_m]Caspian[/name_m]
DD/DD/DD: [name_f]Sable[/name_f] [name_f]Caledonia[/name_f] & [name_f]Feather[/name_f] [name_f]Adelaide[/name_f] & [name_f]Blossom[/name_f] [name_f]India[/name_f]
[name_m]Benedict[/name_m] [name_m]Caspian[/name_m]
[name_m]Liam[/name_m] [name_u]Bay[/name_u] & [name_m]Scott[/name_m] [name_m]Birch[/name_m]
[name_f]Rumer[/name_f] [name_f]Violet[/name_f]
[name_f]Winslet[/name_f] [name_f]Isle[/name_f]
[name_f]Sofia[/name_f] [name_u]Aspen[/name_u]
[name_u]James[/name_u] [name_m]Huckleberry[/name_m]
[name_m]Jonah[/name_m] [name_u]Sage[/name_u]
[name_f]Mila[/name_f] [name_f]Avis[/name_f], [name_f]Scarlett[/name_f] [name_f]Arbor[/name_f] & [name_f]Rosie[/name_f] [name_f]Azalea[/name_f]
(after “celebrities” - [name_m]Benedict[/name_m] Cumberbatch, [name_m]Liam[/name_m] Hemsworth, [name_m]Scott[/name_m] Disick, [name_f]Rumer[/name_f] [name_m]Willis[/name_m], [name_f]Kate[/name_f] [name_f]Winslet[/name_f], [name_f]Sofia[/name_f] Vergara, [name_u]James[/name_u] [name_m]Franco[/name_m], [name_m]Jonah[/name_m] [name_m]Hill[/name_m], [name_f]Mila[/name_f] Kunis, [name_f]Scarlett[/name_f] Johansson & [name_f]Rosie[/name_f] [name_m]Huntington[/name_m]-Whiteley)
All of their first names are nicknames, and their middles are unisex.
[name_m]Liam[/name_m], [name_m]Jack[/name_m], [name_m]Luke[/name_m], [name_f]Evie[/name_f], [name_f]Elsie[/name_f], [name_f]Hattie[/name_f], [name_m]Kenny[/name_m], [name_u]Alex[/name_u], [name_f]Liv[/name_f], [name_f]Emmy[/name_f] & [name_u]Josie[/name_u]
DS: [name_u]Lyric[/name_u] [name_u]Niall[/name_u]
DS/DS: [name_m]Louis[/name_m] [name_u]Alcott[/name_u] & [name_u]Freddie[/name_u] [name_u]Parker[/name_u]
DD: [name_f]Magnolia[/name_f] [name_u]Holland[/name_u]
DD: [name_u]Phoenix[/name_u] [name_u]Hadley[/name_u]
DD: [name_f]Daisy[/name_f] [name_f]Pippa[/name_f]
DS: [name_u]Theo[/name_u] [name_m]Benjamin[/name_m]
DS: [name_m]Archie[/name_m] [name_m]Matthew[/name_m]
DD/DD/DD: [name_f]Clara[/name_f] [name_u]Presley[/name_u], [name_f]Melody[/name_f] [name_f]Oriana[/name_f] & [name_f]Rosie[/name_f] [name_f]Elizabeth[/name_f]
DH: [name_m]Gerald[/name_m] [name_m]Thomas[/name_m] Nolasco.
DW: [name_f]Kassandra[/name_f] [name_u]Leigh[/name_u] Nolasco.
celebrities & saints (haha what a combo!)
DS: [name_m]Joel[/name_m] [name_m]Bernard[/name_m]
DS/DS: [name_m]Jared[/name_m] [name_m]Anthony[/name_m] / [name_m]Jake[/name_m] [name_m]Matthew[/name_m]
DD: [name_f]Britney[/name_f] [name_f]Ruth[/name_f]
DD: Shailene [name_f]Helena[/name_f]
DD: [name_f]Evangeline[/name_f] [name_f]Martha[/name_f]
DS: [name_m]Heath[/name_m] [name_u]Francis[/name_u]
DS: [name_u]Daren[/name_u] [name_m]Lucas[/name_m]
DD/DD/DD: [name_f]Nicole[/name_f] [name_f]Theresa[/name_f] / [name_f]Amanda[/name_f] [name_f]Hildegarde[/name_f] / [name_f]Emma[/name_f] [name_m]Bonaventure[/name_m]
DS: [name_u]Michael[/name_u] [name_u]Alto[/name_u]
DS/DS: [name_m]Lukas[/name_m] [name_u]Reed[/name_u]/[name_m]Matthew[/name_m] [name_u]Tempo[/name_u]
DD: [name_f]Rose[/name_f] [name_f]Calliope[/name_f]
DD: [name_f]Lucy[/name_f] [name_f]Marimba[/name_f]
DD: [name_f]Elizabeth[/name_f] [name_f]Lark[/name_f]
DS: [name_u]James[/name_u] [name_m]Harp[/name_m]
DS: [name_m]John[/name_m] [name_m]Cello[/name_m]
DD/DD/DD: [name_f]Abigail[/name_f] [name_f]Celeste[/name_f]/[name_f]Katharine[/name_f] [name_f]Viola[/name_f]/[name_f]Bridget[/name_f] [name_f]Serenade[/name_f]
S: [name_m]Atticus[/name_m] [name_u]Cassidy[/name_u]
S/S: [name_m]Isaac[/name_m] [name_m]Tennyson[/name_m] & [name_m]Albert[/name_m] [name_u]Sullivan[/name_u]
D: [name_f]Elena[/name_f] [name_u]Morgan[/name_u]
D: [name_f]Erika[/name_f] [name_u]Delaney[/name_u]
D: [name_u]Indiana[/name_u] [name_f]Paige[/name_f]
S: [name_m]Asher[/name_m] [name_m]Jacoby[/name_m]
S: [name_m]Arthur[/name_m] [name_m]Beckett[/name_m]
D/D/D: [name_f]Alexandra[/name_f] [name_f]MacKenna[/name_f] & [name_f]Arianna[/name_f] MacKinley & [name_f]Adelaide[/name_f] [name_u]MacKenzie[/name_u]
[name_m]Atticus[/name_m] (19), [name_m]Isaac[/name_m] & [name_m]Alby[/name_m] (17), [name_f]Lena[/name_f] (13), [name_f]Erika[/name_f] (12), [name_f]Indi[/name_f] (9), [name_u]Ash[/name_u] (6), [name_m]Arthur[/name_m] (4), [name_u]Allie[/name_u] & [name_f]Annie[/name_f] & [name_f]Addie[/name_f] (18mo).
Named using Vowel First Names and Surname Middle Names.