8 standout rare Welsh boy names
These names combine a clear Welsh identity with low current U.S. use and enough history to research beyond a one-line baby-name summary.
Emrys
A compact Welsh form associated with Ambrose, familiar in Welsh tradition but still uncommon in current U.S. births.
2025 U.S.: 157 births · #1,260Peak: 2024 · 185 births
Osian
A distinctly Welsh literary form with a smooth two-syllable sound and very low U.S. use.
2025 U.S.: 9 births · #8,736Peak: 2017 · 9 births
Owain
A long-standing Welsh royal and historical name that remains rare by exact spelling in the United States.
2025 U.S.: 7 births · #10,411Peak: 2008 · 16 births
Taliesin
The name of a major early Welsh poet, distinctive in sound and still extremely uncommon in U.S. birth data.
2025 U.S.: 11 births · #7,624Peak: 2021 · 23 births
Rhydian
A modern Welsh given name tied to an older saintly tradition, with spelling that rewards learning Welsh pronunciation rather than guessing from English.
2025 U.S.: 24 births · #4,356Peak: 2015 · 46 births
Macsen
The Welsh form linked to Magnus Maximus in Welsh tradition, concise and measurably uncommon in the U.S.
2025 U.S.: 40 births · #3,063Peak: 2017 · 41 births
Iago
A Welsh form of James also used in other languages, familiar from literature but extremely rare as a U.S. boy name.
2025 U.S.: 5 births · #12,732Peak: 2022 · 10 births
Hywel
A historic Welsh royal name associated with Hywel Dda, with no published 2025 U.S. count under the exact spelling shown.
2025 U.S.: no published count
28 rare and unusual Welsh boy names
Welsh names that travel relatively easily
Established choices that remain uncommon in the U.S. while being fairly straightforward to introduce once the pronunciation is known.
Emrys
Emrys is rooted in Welsh naming tradition and feels distinctive in current U.S. use.
2025 U.S.: 157 births · #1,260Peak: 2024 · 185 births
Gareth
Gareth keeps a strong Welsh identity while giving the shortlist a sound you are unlikely to hear everywhere.
2025 U.S.: 46 births · #2,776Peak: 2016 · 104 births
Geraint
Geraint is a heritage-rich choice worth learning in its Welsh pronunciation rather than anglicizing automatically.
2025 U.S.: no published count
Idris
Idris is a heritage-rich choice worth learning in its Welsh pronunciation rather than anglicizing automatically.
2025 U.S.: 391 births · #694Peak: 2025 · 391 births
Owain
Owain stands out in the U.S. while remaining an established name rather than an invented spelling.
2025 U.S.: 7 births · #10,411Peak: 2008 · 16 births
Rhydian
Rhydian recorded 24 U.S. births in 2025 at #4,356, keeping this exact spelling well beyond the most-used 1,000 boy names.
2025 U.S.: 24 births · #4,356Peak: 2015 · 46 births
Macsen
Macsen recorded 40 U.S. births in 2025 at #3,063, keeping this exact spelling well beyond the most-used 1,000 boy names.
2025 U.S.: 40 births · #3,063Peak: 2017 · 41 births
Cai
Cai stands out in the U.S. while remaining an established name rather than an invented spelling.
2025 U.S.: 69 births · #2,113Peak: 2022 · 108 births
Iago
Iago had just 5 published U.S. births in 2025 at #12,732, placing this exact spelling deep in rare-name territory.
2025 U.S.: 5 births · #12,732Peak: 2022 · 10 births
Traditional Welsh forms
Names whose spelling and history are central to their Welsh identity.
Aneirin
Aneirin is rooted in Welsh naming tradition and feels distinctive in current U.S. use.
2025 U.S.: no published count
Arwel
Arwel keeps a strong Welsh identity while giving the shortlist a sound you are unlikely to hear everywhere.
2025 U.S.: no published count
Bedwyr
Bedwyr is a heritage-rich choice worth learning in its Welsh pronunciation rather than anglicizing automatically.
2025 U.S.: no published count
Iestyn
Iestyn stands out in the U.S. while remaining an established name rather than an invented spelling.
2025 U.S.: no published countPeak: 2010 · 5 births
Ioan
Ioan is rooted in Welsh naming tradition and feels distinctive in current U.S. use.
2025 U.S.: 6 births · #11,185Peak: 2014 · 11 births
Llewelyn
Llewelyn keeps a strong Welsh identity while giving the shortlist a sound you are unlikely to hear everywhere.
2025 U.S.: 17 births · #5,516Peak: 2024 · 24 births
Osian
Osian is a heritage-rich choice worth learning in its Welsh pronunciation rather than anglicizing automatically.
2025 U.S.: 9 births · #8,736Peak: 2017 · 9 births
Rhodri
Rhodri stands out in the U.S. while remaining an established name rather than an invented spelling.
2025 U.S.: no published countPeak: 2017 · 6 births
Aled
Aled is rooted in Welsh naming tradition and feels distinctive in current U.S. use.
2025 U.S.: no published count
Caradoc
Caradoc keeps a strong Welsh identity while giving the shortlist a sound you are unlikely to hear everywhere.
2025 U.S.: no published count
Deep-cut Welsh heritage names
Very uncommon U.S. choices for families comfortable teaching pronunciation and preserving the Welsh form.
Dafydd
Dafydd is a heritage-rich choice worth learning in its Welsh pronunciation rather than anglicizing automatically.
2025 U.S.: no published count
Dewi
Dewi stands out in the U.S. while remaining an established name rather than an invented spelling.
2025 U.S.: no published count
Emyr
Emyr is rooted in Welsh naming tradition and feels distinctive in current U.S. use.
2025 U.S.: 20 births · #4,909Peak: 2024 · 21 births
Glyn
Glyn keeps a strong Welsh identity while giving the shortlist a sound you are unlikely to hear everywhere.
2025 U.S.: no published countPeak: 1934 · 39 births
Taliesin
Taliesin is rooted in Welsh naming tradition and feels distinctive in current U.S. use.
2025 U.S.: 11 births · #7,624Peak: 2021 · 23 births
Hywel
Hywel is part of this curated guide, although the current SSA history file has no separate row for this exact spelling.
2025 U.S.: no published count
Ifan
Ifan is part of this curated guide, although the current SSA history file has no separate row for this exact spelling.
2025 U.S.: no published count
Iolo
Iolo is part of this curated guide, although the current SSA history file has no separate row for this exact spelling.
2025 U.S.: no published count
Gethin
Gethin is part of this curated guide, although the current SSA history file has no separate row for this exact spelling.
2025 U.S.: no published count
The data line uses the exact spelling shown. “No published 2025 count” can mean the spelling had zero births or fewer than five, because SSA does not publish counts below five.
Unfamiliar is not the same as weird
Searchers sometimes type phrases such as “weird Welsh names,” but a spelling that looks unusual to an English speaker is not strange or invented. Welsh has its own consistent sound system, and names such as Rhydian, Iestyn and Dafydd make much more sense once you hear them pronounced in Welsh.
Pronunciation deserves more than an English guess
Welsh spelling is systematic, but letters and combinations do not always sound the way an English speaker expects. Before choosing a name, listen to a reliable Welsh speaker or language reference and treat any English pronunciation guide as an approximation.
Welsh rarity and U.S. rarity are different ideas
A name can be traditional or recognizable in Wales while barely appearing in U.S. data. The 2025 count on each card measures American use of the exact spelling, not the name’s cultural importance in Wales.
Popular Welsh names belong in a different bucket
Dylan, Owen and Rhys have strong Welsh connections, but current U.S. usage is far too high for this page to describe them as rare. Keeping them separate prevents “Welsh” from automatically becoming “rare.”
Sources for this guide
We use these references for popularity, language, origin or historical context. External sources open in a new tab.
Roscoe's pick
Emrys
Emrys is compact, unmistakably Welsh and uncommon in the U.S. without feeling impossible to say or spell.
More names to explore
Questions parents ask
What are some rare Welsh boy names?
Emrys, Osian, Owain, Taliesin, Rhydian, Macsen, Iago and Hywel are strong examples with a clear Welsh connection and low current U.S. use.
Why do Welsh boy names look unusual to English speakers?
Welsh uses its own spelling and sound rules. Letter combinations that look unfamiliar in English can be predictable in Welsh, so pronunciation is better learned from Welsh sources than guessed from English spelling.
Are Dylan, Owen and Rhys rare Welsh boy names?
Not in current U.S. data. They are Welsh names, but all three are much more widely used than the genuinely uncommon choices on this page.
Does no published 2025 count mean a Welsh name was unused?
No. The SSA national file does not publish a spelling when it was recorded fewer than five times for a sex in a year, so a missing count can mean zero or one to four births.