You’d like an “unusual, artistic, British, countryside, strong, intelligent” name? OK… breaking down your favorites…
[name]Hugo[/name]: this is in no way a British name. It’s given in [name]Britain[/name], sure, in the same way that [name]Jaden[/name] and [name]Enzo[/name] are given-- as a cultural import. The British form is the [name]Norman[/name] [name]Hugh[/name], or the Welsh [name]Huw[/name] as pointed out above. It does not read “pastoral” or countryside to me. And it certainly is not suffering from over-popularity; the majority of US Hugos are Hispanic and the name has been quietly given in the community for decades. Hipsters are starting to catch on to it. In 2011, exactly 202 little boys were named [name]Hugo[/name], spread out over >1 million births. So, if this is your favorite name, a name you’ve loved for years, by all means bestow it.
[name]Fielding[/name]: this hits all of your marks. “[name]Field[/name]” evokes the countryside, it’s a British surname, it strikes me as a rather patrician and/or literary name, and it’s unusual without being odd. 8 boys were named [name]Fielding[/name] last year.
[name]Burl[/name] this actually misses all of your marks. It suffers from the terribly unfashionable -url ending; it skews more huckster rube than fine country gentleman; and I could never imagine anyone in the UK carrying it.
Bixby: I like the quirky style of Bixby. It’s a British surname but decidedly nonpretentious, and it reminds me of [name]Bix[/name] Beiderbecke and therefore always carries a nice jazzy association. I think this one should stay under consideration.
[name]Dashiell[/name]: if you don’t want trendy, stay away from [name]Dashiell[/name]. This is the hipster name par excellence. My baby is in daycare with two of them. The SSA data does not reflect it, but if you live in [name]Brooklyn[/name], SF, [name]Santa[/name] [name]Monica[/name], [name]Austin[/name], Seattle, [name]Portland[/name] or other hipster pockets you will run into other little Dashes.
Other options:
[name]Lytton[/name] (as in Strachey)
Somerset (as in Maugham-- and a County in [name]England[/name])
[name]Auberon[/name] (as in Waugh, and [name]King[/name] of the Fairies in British folklore)
[name]Stirling[/name] (as in Castle/[name]Scotland[/name])
Strathmore (as in the ancient earls of Strathmore)
Linley (as in Viscount Linley)
Senneck (the medieval abbreviation of Sevenoaks, [name]Kent[/name])
Copley ([name]John[/name] Singleton Copley, American painter; derived from a copse of woods)