So my husband and I are still discussing middles for Willa! Willa Saint Jane is still a front runner, but we are debating between some longer middles as well and he’s recommended a few of the following!! 
[name_f]Willa[/name_f] [name_f]Beatrix[/name_f] is lovely
Tricky for me as the last option is my daughter’s name (though she has a second middle too). I obviously love it and also really like [name_f]Bernadette[/name_f]. Don’t love [name_f]Beatrix[/name_f] generally but it’s fab after [name_f]Willa[/name_f]!
I still think [name_f]Willa[/name_f] [name_u]Saint[/name_u] [name_f]Jane[/name_f] beats out all of these options 