[name_m]Hi[/name_m] there.
[name_m]Harrison[/name_m] & [name_f]Katherine[/name_f] nn [name_f]Kate[/name_f] would be wonderful for siblings. [name_f]Elena[/name_f] is pretty from your list too, but honestly, I think that it’s just as common as [name_f]Kate[/name_f] these days. [name_u]Remi[/name_u] is kind of boyish to me. I’m not a fan of unisex names. It’s about equally popular for boys & girls. [name_f]Rosie[/name_f] is classic & adorable. Better as a nn in my opinion. [name_f]Rose[/name_f], [name_f]Rosalie[/name_f], [name_f]Rosalind[/name_f], [name_f]Rosamund[/name_f], [name_f]Rosalia[/name_f] or [name_f]Primrose[/name_f] nn [name_f]Rosie[/name_f] are all great.
A few more ideas maybe using [name_f]Katherine[/name_f] in the mn spot. I’ll try to suggest names that are classic yet not way over done.
[name_f]Adele[/name_f] [name_f]Katherine[/name_f]
[name_f]Adela[/name_f] [name_f]Katherine[/name_f]
[name_f]Celia[/name_f] [name_f]Katherine[/name_f]
[name_f]Cecilia[/name_f] [name_f]Katherine[/name_f]
[name_f]Delia[/name_f] [name_f]Katherine[/name_f]
[name_f]Dahlia[/name_f] [name_f]Katherine[/name_f]
[name_f]Esme[/name_f] [name_f]Katherine[/name_f]
[name_f]Eloise[/name_f] [name_f]Katherine[/name_f]
[name_f]Eve[/name_f] [name_f]Katherine[/name_f]
[name_f]Estelle[/name_f] [name_f]Katherine[/name_f]
[name_f]Estella[/name_f] [name_f]Katherine[/name_f]
[name_f]Gemma[/name_f] [name_f]Katherine[/name_f]
[name_u]Louise[/name_u] [name_f]Katherine[/name_f]
[name_f]Louisa[/name_f] [name_f]Katherine[/name_f]
[name_f]Lydia[/name_f] [name_f]Katherine[/name_f]
[name_f]Molly[/name_f] [name_f]Katherine[/name_f]
[name_f]Olive[/name_f] [name_f]Katherine[/name_f]
[name_f]Stella[/name_f] [name_f]Katherine[/name_f]
[name_f]Tessa[/name_f] [name_f]Katherine[/name_f]
[name_u]Vida[/name_u] [name_f]Katherine[/name_f]
[name_f]Willa[/name_f] [name_f]Katherine[/name_f]
[name_f]Zella[/name_f] [name_f]Katherine[/name_f]
[name_f]Hope[/name_f] this helps.