Here’s a few suggestions!
More classic names:
[name_u]Jack[/name_u] [name_m]Frederick[/name_m], [name_u]Henry[/name_u] [name_m]Graham[/name_m] and [name_u]Tristan[/name_u] [name_m]Alexander[/name_m]
[name_u]Jack[/name_u] [name_m]Frederick[/name_m], [name_u]Henry[/name_u] [name_m]Graham[/name_m] and [name_m]Keith[/name_m] [name_u]William[/name_u]
[name_u]Jack[/name_u] [name_m]Frederick[/name_m], [name_u]Henry[/name_u] [name_m]Graham[/name_m] and [name_m]Peter[/name_m] [name_u]James[/name_u]
[name_u]Jack[/name_u] [name_m]Frederick[/name_m], [name_u]Henry[/name_u] [name_m]Graham[/name_m] and [name_m]Oscar[/name_m] Ian/John
[name_u]Jack[/name_u] [name_m]Frederick[/name_m], [name_u]Henry[/name_u] [name_m]Graham[/name_m] and [name_m]Grant[/name_m] [name_m]Oliver[/name_m]
More unique but still pairing well:
[name_u]Jack[/name_u] [name_m]Frederick[/name_m], [name_u]Henry[/name_u] [name_m]Graham[/name_m] and [name_m]Benson[/name_m] [name_u]Rhodes[/name_u]
[name_u]Jack[/name_u] [name_m]Frederick[/name_m], [name_u]Henry[/name_u] [name_m]Graham[/name_m] and [name_m]Faolan[/name_m] [name_m]Kent[/name_m]
[name_u]Jack[/name_u] [name_m]Frederick[/name_m], [name_u]Henry[/name_u] [name_m]Graham[/name_m] and [name_m]Ranier[/name_m] [name_m]Matthew[/name_m]
[name_u]Jack[/name_u] [name_m]Frederick[/name_m], [name_u]Henry[/name_u] [name_m]Graham[/name_m] and [name_u]Sascha[/name_u] [name_m]Lewis[/name_m]
[name_u]Jack[/name_u] [name_m]Frederick[/name_m], [name_u]Henry[/name_u] [name_m]Graham[/name_m] and [name_u]Wesley[/name_u] [name_m]Gerard[/name_m]
[name_f]Hope[/name_f] this helps! 