Alternative Name to Honor Lyndon?

My fiancé and I are looking for an alternative middle name to honor his grandfather [name_m]Lyndon[/name_m] “[name_u]Lyn[/name_u]”. For a girl, we have [name_u]Evelyn[/name_u] (and [name_u]Lennox[/name_u]). But what about for a boy?? Any suggestions?

Thank you, [name_f]Zoie[/name_f]

[name_m]Lyndon[/name_m] [name_f]Honor[/name_f] names:

[name_u]London[/name_u]
[name_m]Landon[/name_m]
[name_u]Lyle[/name_u]
[name_m]Lynx[/name_m]
[name_m]Don[/name_m]
[name_m]Eldon[/name_m]
[name_f]Aldon[/name_f]

[name_u]Brooklyn[/name_u]
[name_u]Flynn[/name_u]

You could use [name_m]Lyndon[/name_m]'s middle or surname, if useable. Or, maybe his birthday is in [name_u]August[/name_u] or something he loves as in perhaps a nature name.