Llewellyn/Llywelyn is a common patriotic first name in Wales, with its distinctive Welsh double LL's; in the U.S. Llewellyn would make a daring choice, though with the chance that some might find the ellen sound slightly feminine.

Owen, a resonant Celtic name, has ranked among the Top 100 boys' names in the US for 20 years and is now at its highest point ever.

Rugged but gentle, Rhys is the traditional Welsh spelling of this name, which can also be anglicized as Reese or Reece. Up until 2010, Reese was the preferred spelling in the US, perhaps because parents were concerned about mispronunciation. However, Rhys has since taken over for boys and is now used twice as often as Reese.

Magical and powerful, but gentle and approachable too, Emrys is a Welsh name which may be worth considering if you're looking for something less common that Dylan, Evan, or Morgan. An offbeat epithet of the wise wizard Merlin, it's currently in the Welsh top 100 and in the England and Wales Top 500 over all.

Maddox, a previously obscure Welsh family name with a powerfully masculine image, suddenly came into the spotlight when Angelina Jolie chose it for her son in 2003. By the following year it was in the middle of the Top 1000, and it has risen since.

Bowen is a Celtic surname representing two separate Celtic strains, one Welsh and one Irish, and entered the US Top 1000 for the first time in 2011.

A name that crosses cultures, Idris was virtually unknown in the US before the emergence of the charismatic actor Idris Elba, first on The Wire and then for depicting Nelson Mandela. Since then, the name has grown with the actor and is a popular choice in the UK and Belgium, and a familiar one in The Netherlands, France, and the US.

This cross-cultural name, found in Wales, Brittany, and Spain, is a surprise star in the U.S in recent years, largely thanks to actor Gael Garcia Bernal. Also written as Gaël, it's a popular choice across Spain, Mexico, Chile, Uruguay, and France, and the US.

Wynn or Wyn is a Welsh male name deriving from the very productive gwyn element, which forms part of all Welsh names ending -wyn or -wen, as well as the Gwen names and the Irish Fin- names. Wynn is a soft and gentle yet sturdy choice which feels quietly timeless and charming.

Vaughn, also commonly spelled Vaughan, has been used quietly over the years, reaching a peak of Number 349 in 1949. It is now in the process of rediscovery, being seen as a good Sean alternative or an updated way to honor an ancestral Paul (which also means small).

An Anglicized spelling of the Welsh Rhys, this traditional boys' name got a big boost for girls in the early 2000s, thanks to the high-profile Ms. Witherspoon (who was actually born Laura Jeanne Reese, her second middle being her mother's maiden name). This spelling has been on the decline for boys since 2003, possibly for the same reason, but remains a strong, simple choice which might pose fewer spelling and pronunciation issues outside of the UK than the Welsh original.

Said to be the name of the most learned man in ancient Wales, in this country it would be open to mispronunciation, making it rhyme with Julien.

Macsen may sound like a modern invention, cousin to Jackson and Maxon, but it's a longtime Welsh variation of Maximus with evocative roots in legend. Macsen Wledig is another name for the Roman emperor Magnus Maximus, was played an important role in Welsh history and was further immortalized in a poem celebrating his dream about his lover Elen. Macsen also appears in Arthurian legend.

Seren, meaning "star", is one of the top girls' names in Wales, but as a boys' name it has a different derivation. It's a rare Polish form of the Latin Serenus, mostly used to refer to the Saint and meaning "serene". It could make for a handsome and almost unknown alternative to rising star Soren.

Cael is the name of the angel of the zodiac sign of Cancer and also of a warrior of Irish mythology. Its ascendance to the Top 1000 over the past decade probably has to do with its similarity to Cale and Kale (and Kyle and Cayden etcetera).

Though Eoin is a Gaelic form of John, its Anglicized pronunciation links it directly to Owen. Eoin is currently a Top 30 name in Ireland. Other variations: Ewan, Ewen, Evan and Eoghan (pronounced as Owen but also translated as Eugene).

A classic Welsh name, softer than Griffin and friendlier to spell than Gruffudd - that hasn't had as much love as it deserves elsewhere. Namesakes range from medieval kings to the philanthropist Griffith J. Griffith, who left land to the city of Los Angeles. It's great in full, but Griff is cool too.

The simple and attractive Bryn is well used for boys in Wales, and does have a history as a male name in the US, although both Bryn and Brynn are currently far more popular for girls.

Jago is a dashing alternative to overused favorite Jacob.

This old Cornish name took on a whole new identity via Denzel Washington, who has inspired several thousand namesakes. The actor was named after his father, who was named for a Dr. Denzel, who delivered him.