[name_m]Otto[/name_m] is cool! I really like [name_m]Arthur[/name_m] with [name_m]Louis[/name_m], it is getting popular here in the UK but is still a lovely name, and is no more popular that [name_m]Louis[/name_m] is
What about… [name_m]Ezra[/name_m], [name_m]Frederick[/name_m], [name_m]Baxter[/name_m], [name_m]Albert[/name_m] ([name_m]Albie[/name_m] or [name_u]Bertie[/name_u]), [name_m]Jago[/name_m], [name_m]Solomon[/name_m], [name_u]Rudy[/name_u], [name_u]Alden[/name_u], [name_m]Soren[/name_m], [name_u]Stanley[/name_u], [name_u]Emerson[/name_u], [name_m]Casper[/name_m], [name_m]Amos[/name_m], [name_m]Milo[/name_m], [name_m]Roman[/name_m], [name_u]Arlo[/name_u], [name_u]Sasha[/name_u], [name_m]Otis[/name_m], [name_u]Rafe[/name_u], [name_m]Walter[/name_m], [name_u]Emmett[/name_u], [name_u]Rory[/name_u], [name_u]Kit[/name_u], [name_m]Wilfred[/name_m], [name_u]Lennon[/name_u] / [name_u]Lennox[/name_u], [name_m]Moses[/name_m], [name_m]Stellan[/name_m], [name_u]August[/name_u], [name_m]Silas[/name_m], [name_u]Asa[/name_u], [name_m]Felix[/name_m], [name_m]Samson[/name_m], [name_m]Ralph[/name_m], [name_m]Abel[/name_m], [name_u]Walker[/name_u], [name_u]Jude[/name_u], [name_m]Bram[/name_m] or [name_u]Sidney[/name_u]
I especially like [name_u]August[/name_u] or [name_u]Sidney[/name_u] for you - [name_u]Gus[/name_u] or [name_m]Sid[/name_m] is very cool and cute, but the full names match the classicness of [name_m]Louis[/name_m]. Maybe something like [name_u]August[/name_u] [name_u]Dexter[/name_u] or [name_u]Sidney[/name_u] [name_m]Arthur[/name_m]
I’d recommend looking through the lists on the website http://www.britishbabynames.com/ as well