Older Sibling Figure/Mentor

What are good male and female names for someone who is a older sibling figure/mentor?

I’ll give a variety of styles to work for different time periods/settings…

[name_m]Hugo[/name_m]
[name_u]Arthur[/name_u]
[name_m]Ethan[/name_m]
[name_u]Sage[/name_u]
[name_u]Zion[/name_u]
[name_m]Conrad[/name_m]
[name_u]Ezra[/name_u]
[name_u]Theo[/name_u]
[name_m]Roman[/name_m]
[name_m]Stone[/name_m]
[name_u]Jude[/name_u]
[name_m]Thomas[/name_m]
[name_m]Shepherd[/name_m]

[name_f]Josephine[/name_f]
[name_f]Rosemary[/name_f]
[name_f]Lilah[/name_f]
[name_f]Celeste[/name_f]
[name_u]Quinn[/name_u]
[name_f]Iris[/name_f]
[name_f]Verity[/name_f]
[name_f]Heather[/name_f]
[name_u]Cassidy[/name_u]
[name_u]Drew[/name_u]
[name_u]Seren[/name_u]
[name_u]Rumi[/name_u]
[name_u]Arden[/name_u]

I used [name_u]James[/name_u] and [name_m]Calix[/name_m] for mine. That’s what I used in my story. Also [name_u]Kai[/name_u], [name_m]Forrest[/name_m], [name_u]Liam[/name_u].
For girls: I used [name_f]Octavia[/name_f] and [name_f]Andie[/name_f]. Also [name_f]Avila[/name_f], [name_f]Fiona[/name_f], Dreya/Drea.