So are you ruling out all girls names ending in 'a'?
Cos I was going to suggest
Katarina
Allegra
Francesca

Would you consider using Leni as a middle name?


so without an A

Gabrielle Lena
Isobel Lena
Katharine Lena
Emily Lena
Christianne Lena
Stephanie Lena
Olive Lena
Violet Lena
Lucy Lena
Ariane Lena