I like quirky middle names for sure. Last name is 4 syllables and begins w an L but I still think a single syllable first name probably needs a multi syllable middle name?
Gwen [name_u]Aspen[/name_u]
[name_f]Gwen[/name_f] [name_f]Mavis[/name_f]
[name_f]Gwen[/name_f] [name_u]Alva[/name_u]
[name_f]Gwen[/name_f] [name_f]Jessa[/name_f]
[name_f]Gwen[/name_f] [name_f]Viveca[/name_f]
[name_f]Gwen[/name_f] [name_f]Darla[/name_f]
[name_f]Gwen[/name_f] [name_f]Galilee[/name_f]
[name_f]Gwen[/name_f] [name_f]Eugenia[/name_f]
[name_f]Gwen[/name_f] [name_f]Enid[/name_f]
[name_f]Gwen[/name_f] [name_f]Daphne[/name_f]
[name_f]Gwen[/name_f] [name_f]Esther[/name_f]
[name_f]Gwen[/name_f] [name_f]Emerald[/name_f]
[name_f]Gwen[/name_f] [name_f]Dorothy[/name_f]
[name_f]Gwen[/name_f] [name_f]Davina[/name_f]
[name_f]Gwen[/name_f] [name_u]Taliesin[/name_u]
Gwen [name_f]Octavia[/name_f]
[name_f]Gwen[/name_f] [name_f]Delilah[/name_f]
[name_f]Gwen[/name_f] [name_f]Jasmine[/name_f]
[name_f]Gwen[/name_f] [name_f]Louisa[/name_f]
[name_f]Gwen[/name_f] [name_f]Josephine[/name_f]
[name_f]Gwen[/name_f] [name_f]Frances[/name_f]
[name_f]Gwen[/name_f] [name_f]Astrid[/name_f]
[name_f]Gwen[/name_f] [name_f]Esther[/name_f]
[name_f]Gwen[/name_f] [name_f]Marigold[/name_f]
[name_f]Gwen[/name_f] [name_f]Colette[/name_f]
[name_f]Gwen[/name_f] [name_f]Mabel[/name_f]
[name_f]Gwen[/name_f] [name_f]Catherine[/name_f]
[name_f]Gwen[/name_f] [name_f]Carys[/name_f]
[name_f]Gwen[/name_f] [name_f]Lucy[/name_f]
LOVE [name_f]Gwen[/name_f] 
Gwen [name_f]Tigerlily[/name_f]
[name_f]Gwen[/name_f] [name_f]Marigold[/name_f]
[name_f]Gwen[/name_f] [name_u]Juniper[/name_u]
[name_f]Gwen[/name_f] [name_f]Isabeau[/name_f]
[name_f]Gwen[/name_f] [name_f]Marceline[/name_f]
[name_f]Gwen[/name_f] [name_f]Jubilee[/name_f]
[name_f]Gwen[/name_f] [name_f]Arrietty[/name_f]
[name_f]Gwen[/name_f] [name_f]Rosalie[/name_f]
[name_f]Gwen[/name_f] [name_f]Mirabelle[/name_f]
[name_f]Gwen[/name_f] [name_u]Romilly[/name_u]
[name_f]Gwen[/name_f] [name_f]Kirrily[/name_f]
[name_f]Gwen[/name_f] [name_f]Salome[/name_f]
[name_f]Gwen[/name_f] [name_u]Valentine[/name_u]
I think a two or three syllable middle would flow nicely with your last name.
Gwen [name_u]January[/name_u]
[name_f]Gwen[/name_f] [name_f]Amoret[/name_f]
[name_f]Gwen[/name_f] [name_u]Collins[/name_u]
[name_f]Gwen[/name_f] [name_f]Olympia[/name_f]
[name_f]Gwen[/name_f] [name_f]Alessia[/name_f]
[name_f]Gwen[/name_f] [name_f]Justine[/name_f]
[name_f]Gwen[/name_f] [name_f]Tova[/name_f]
[name_f]Gwen[/name_f] [name_f]Amara[/name_f]
Gwen [name_f]Aurelia[/name_f]
[name_f]Gwen[/name_f] [name_f]Primrose[/name_f]
[name_f]Gwen[/name_f] [name_f]Penelope[/name_f]
[name_f]Gwen[/name_f] [name_f]Daphne[/name_f]
[name_f]Gwen[/name_f] [name_f]Iliana[/name_f]
[name_f]Gwen[/name_f] [name_f]Madeline[/name_f]
[name_f]Gwen[/name_f] [name_f]Ianthe[/name_f]
[name_f]Gwen[/name_f] [name_u]Juniper[/name_u]
[name_f]Gwen[/name_f] [name_f]Fiora[/name_f]
[name_f]Gwen[/name_f] [name_f]Hadassah[/name_f]
[name_f]Gwen[/name_f] [name_u]Bodhi[/name_u]
[name_f]Gwen[/name_f] [name_f]Beatrix[/name_f]
[name_f]Gwen[/name_f] [name_f]Lyra[/name_f]
[name_f]Gwen[/name_f] [name_f]Eliora[/name_f]
I really like [name_f]Gwen[/name_f]!
Here are some potential creative ideas:
Gwen [name_f]Fiorenza[/name_f]
[name_f]Gwen[/name_f] Talulah
[name_f]Gwen[/name_f] [name_f]Lavinia[/name_f]
[name_f]Gwen[/name_f] Herald
[name_f]Gwen[/name_f] Corinthia
[name_f]Gwen[/name_f] [name_f]Francesca[/name_f]
Love [name_f]Gwen[/name_f]!
Gwen [name_f]Renee[/name_f]
[name_f]Gwen[/name_f] [name_f]Anastasia[/name_f]
[name_f]Gwen[/name_f] [name_f]Amethyst[/name_f]
[name_f]Gwen[/name_f] [name_u]Juniper[/name_u]
[name_f]Gwen[/name_f] [name_u]Bellamy[/name_u]
[name_f]Gwen[/name_f] [name_f]Rosalie[/name_f]
[name_f]Gwen[/name_f] [name_f]Tulip[/name_f]
[name_f]Gwen[/name_f] [name_u]Dove[/name_u]
[name_f]Gwen[/name_f] [name_f]Ophelia[/name_f]
[name_f]Gwen[/name_f] [name_f]Felicity[/name_f]
[name_f]Gwen[/name_f] [name_u]Ocean[/name_u]
[name_f]Gwen[/name_f] [name_f]Alexandria[/name_f]