first of all, I love your boys’ names! all of them are somewhere on my list and they go so perfectly together! a lot of your girl considerations are also favorites of mine (including [name_m]Rowan[/name_m], my top girl name)
my first thought for witchy, dark cottagecore, [name_f]Fia[/name_f] but maybe a little more, was [name_f]Freyja[/name_f]! similar in sound to [name_f]Fia[/name_f] but feels more complete, and for a bonus dark/opposite of peaceful meaning, [name_m]Friday[/name_m] the 13th is associated with the goddess [name_f]Freya[/name_f] in Norse mythology.
other ideas, leaning into the “witchy” vibes…
[name_f]Adeluna[/name_f]
[name_f]Amity[/name_f]
[name_f]Amoret[/name_f]
[name_f]Ariadne[/name_f]
[name_m]Artemis[/name_m]
[name_f]Astraea[/name_f]
[name_f]Calixta[/name_f]
[name_f]Calluna[/name_f]
Fajra (“FY-ruh” meaning “fiery”)
[name_m]Hollis[/name_m]
[name_f]Juno[/name_f]
[name_f]Lazuli[/name_f]
Lilouna
[name_f]Maiwenn[/name_f]
[name_f]Onnolee[/name_f]
[name_f]Orla[/name_f]
[name_f]Vesper[/name_f]
[name_f]Zephyrine[/name_f]