What about [name_u]Sutton[/name_u]? Similar feeling to [name_m]Soren[/name_m] and I think it matches your other name choices.
Others could be:
[name_u]Onyx[/name_u]
[name_u]Grayson[/name_u]
[name_u]Kai[/name_u]
[name_m]Ronin[/name_m]
[name_m]Westley[/name_m] & [name_u]Logan[/name_u] 
[name_m]Westley[/name_m] & [name_u]Kyle[/name_u]
[name_m]Westley[/name_m] & [name_m]Felix[/name_m]
[name_m]Westley[/name_m] & [name_u]Fern[/name_u]
[name_m]Westley[/name_m] & [name_u]Noel[/name_u]
[name_m]Westley[/name_m] & [name_m]Tobias[/name_m]
[name_m]Westley[/name_m] & [name_m]Myles[/name_m]
There have been so many suggestions but with [name_m]Westley[/name_m] I can see you with :
[name_u]Berkeley[/name_u] or [name_m]Calvin[/name_m]