I love [name_m]Sébastien[/name_m] with big siblings’ names!
A few more that haven’t been suggested yet. I starred the ones that have nature connections:
*Samson
*Soren / [name_f]Sorin[/name_f]
*Orson
*Saturn
[name_m]Séraphin[/name_m]
[name_m]Edison[/name_m]
[name_m]Nelson[/name_m]
I also want to second the above ideas of [name_m]Solomon[/name_m], [name_f]Simeon[/name_f], and [name_m]Sylvan[/name_m]!