With a 3 syllable first and a longer last name, I’d steer clear of long middles like [name]Genevieve[/name], [name]Elizabeth[/name], [name]Georgiana[/name], and [name]Eugenie[/name] (though I do like them). I think [name]Charlotte[/name] and [name]Annette[/name] are ok, but much prefer [name]Claire[/name], [name]Helen[/name], and original [name]Tirtza[/name]. Congrats!
I like [name]Tirtza[/name] simply bc it has meaning for your DH’s family! And since it sounds like you picked the fn, I think I’d give him the mn. Otherwise I also like [name]Helen[/name]. I’m tiring of [name]Claire[/name] as a mn, and it also has the same ai sound in it as [name]Abigail[/name], to my ears.