I know this is an older post - maybe your son is already born and named! - but we are having baby boy #2 in the fall, and our first son is [name_m]Silas[/name_m]. Our top pick for the next boy is [name_m]Asher[/name_m]. I think they go so well together! We also love [name_m]Leo[/name_m] (it would be a nn for [name_u]Lionel[/name_u]) and we also love the richness and strength of Hebrew names but aren’t Jewish. We have similar tastes and styles for sure! Let us know what you decide on! 
[name_m]Silas[/name_m] and [name_m]Asher[/name_m] are one of my all time favourite sibling names.
[name_m]Hugo[/name_m] and [name_u]Everett[/name_u] are also beautiful.
What about:
[name_m]Hugh[/name_m]
[name_u]Reed[/name_u]
[name_m]Wyatt[/name_m]
[name_u]Sawyer[/name_u]
[name_u]Quinn[/name_u]
[name_u]Gus[/name_u]
[name_m]Levi[/name_m]