Names for some siblings?

Writers' Corner
1

I have a sibset of 5 i need help with, i currently have
[name_u]Killian[/name_u]
[name_m]Felix[/name_m]
[name_m]Alistair[/name_m]
Lisander/Lysander
[name_f]Lilith[/name_f]

The names should have a dark academia ish feel and slightly mysterious for my secret society

The ones im for sure keeping are [name_f]Lilith[/name_f] and possibly [name_u]Killian[/name_u] but the others aren’t really doing it for me… i love how the L and I letters look together but that’s not a requirement, thanks for any help!

2

[name_m]Lucian[/name_m]
[name_f]Isadora[/name_f]
[name_u]Thaddeus[/name_u]
[name_f]Elowen[/name_f]
[name_m]Lazarus[/name_m]

3

[name_u]Seth[/name_u]
[name_m]Oliver[/name_m]
[name_u]Jasper[/name_u]
[name_m]Reuben[/name_m]
[name_m]Fletcher[/name_m]

4

[name_f]Lilith[/name_f], [name_u]Killian[/name_u], and…

[name_f]Antigone[/name_f]
[name_m]Cassander[/name_m]
[name_m]Alaric[/name_m]
[name_u]Endellion[/name_u]
[name_m]Gideon[/name_m]
[name_m]Julius[/name_m]
Marcelline/Mercedes