I love the names [name_m]Rohan[/name_m] & [name_m]Silas[/name_m]!
Of your lists, I like [name_m]Orson[/name_m] & [name_m]Hugh[/name_m] best. I love how with [name_m]Orson[/name_m], you can use [name_m]Sonny[/name_m] or [name_m]Bear[/name_m] as nicknames. [name_m]Hugh[/name_m] is an immediately likeable and trustworthy name!
I like [name_m]Aslan[/name_m] - which is almost a smoosh of [name_m]Rohan[/name_m] and [name_m]Silas[/name_m] - but there is some teasing potential there. I also think [name_m]Helo[/name_m] might get teased as Hello, [name_f]Halo[/name_f], Hell-no, Helicopter etc. He wouldn’t have as smooth a ride with his name as his brothers.
I don’t mind [name_f]Lenya[/name_f] - I’m just not massively keen on “ya” ending names (Tanya, [name_f]Sonia[/name_f] etc) and it might be less flowy with your last name?
I quite like [name_f]Aruna[/name_f], just a little turned off as I know one and she gets “Runes” for short, I guess Ru could be a sweeter nickname. [name_f]Noa[/name_f] reads distinctly Hebrew to me (at least without knowing more).
I am somewhat drawn to [name_f]Anthea[/name_f] but prefer the similar [name_f]Athena[/name_f], [name_f]Ianthe[/name_f], [name_f]Xanthe[/name_f] or [name_f]Anwen[/name_f]. [name_f]Xanthe[/name_f] & [name_f]Athena[/name_f] would sound epic with your boys’ names.
Some other names (keeping everyone with own starting letter)
[name_f]Indira[/name_f]
[name_f]Ffion[/name_f]
[name_f]Amaya[/name_f]
[name_f]Eira[/name_f]
[name_f]Liora[/name_f]
[name_f]Bryony[/name_f]
[name_f]Lowenna[/name_f]
[name_f]Gweneth[/name_f]
[name_f]Leonor[/name_f]
[name_f]Junia[/name_f]
[name_f]Zinnia[/name_f]
[name_f]Zélie[/name_f]
[name_f]Imogen[/name_f]
[name_f]Talvi[/name_f]
[name_f]Mira[/name_f]
[name_m]Dashiell[/name_m]
[name_m]Conrad[/name_m] (a fave!)
[name_m]Alaric[/name_m]
[name_m]Vincent[/name_m]
[name_m]Hugo[/name_m]
[name_m]Kieran[/name_m]
[name_m]Finnian[/name_m]
[name_m]Ashwin[/name_m]
[name_m]Ashby[/name_m]
[name_m]Hamish[/name_m]
[name_m]Wilfred[/name_m]
[name_m]Bastian[/name_m]
[name_m]Emrys[/name_m] (unless too close to Silas?)
[name_m]Lucien[/name_m]
[name_m]Ambrose[/name_m]
[name_m]Leander[/name_m]