Séaghdha m Irish (Rare)From Old Irish
Ségdae, probably derived from
ségda meaning
"fine, good, favourable, learned". According to an Irish legend this was the name of a boy who was set to be sacrificed but was saved by his mother.
Seán m IrishIrish form of
John, derived via the Old French form
Jehan.
Sean m Irish, EnglishAnglicized form of
Seán. This name name, along with variants
Shawn and
Shaun, began to be be used in the English-speaking world outside of Ireland around the middle of the 20th century.
Senán m Irish, Old IrishMeans
"little old one", derived from Old Irish
sen "old" combined with a diminutive suffix. Saint Senán was a 6th-century monk who founded the monastery on Inis Cathaigh.
Seren f WelshMeans
"star" in Welsh. This is a recently created Welsh name.
Shane m Irish, EnglishAnglicized form of
Seán. It came into general use in America after the release of the western movie
Shane (1953).
Síofra f IrishMeans
"elf, sprite" in Irish. This name was created in the 20th century.
Sionann f Irish MythologyIn Irish legend this was the name of a granddaughter of the sea god
Lir who went to Connla's Well, which was forbidden. The well burst and drowned her, leaving her body in the river thereafter known as the
Sionainn (see
Shannon).
Sláine f & m Old Irish, Irish MythologyFrom Old Irish
slán meaning
"health, safety". This was the name of a legendary high king of Ireland, one of the Fir Bolg. It was also the name of a daughter of the 11th-century high king Brian Boru.
Sorcha f Irish, Scottish GaelicMeans
"radiant, bright" in Irish. It has been in use since late medieval times. It is sometimes Anglicized as
Sarah (in Ireland) and
Clara (in Scotland).
Suibhne m Irish MythologyFrom Old Irish
Suibne, possibly derived from
subae meaning
"joy, pleasure". This was the name of several figures from early Irish history, including a 7th-century high king and an 8th-century saint. It also appears in the Irish legend
Buile Suibhne (meaning "The Madness of Suibhne") about a king who goes insane after being cursed by Saint Rónán Finn.
Sweeney m Irish MythologyAnglicized form of
Suibhne. In fiction, this name is borne by the murderous barber Sweeney Todd, first appearing in the British serial
The String of Pearls: A Romance (1846-1847).
Tadhg m Irish, Irish MythologyFrom Old Irish
Tadg meaning
"poet". This was the name of an 11th-century king of Connacht, as well as several other kings and chieftains of medieval Ireland. According to Irish mythology it was the name of the grandfather of
Fionn mac Cumhaill.
Taffy m WelshAnglicized form of
Dafydd. It has been used as a slang term for a Welshman.
Talfryn m WelshFrom a Welsh place name meaning
"front hill", derived from Welsh
tal "front, extremity" and
bryn "hill".
Taliesin m Welsh, Welsh MythologyMeans
"shining brow", derived from Welsh
tal "brow, head" and
iesin "shining, radiant". This was the name of a semi-legendary 6th-century Welsh poet and bard, supposedly the author of the collection of poems the
Book of Taliesin. He appears briefly in the Welsh legend
Culhwch and Olwen and the Second Branch of the
Mabinogi. He is the central character in the
Tale of Taliesin, a medieval legend recorded in the 16th century, which tells how
Ceridwen's servant Gwion Bach was reborn to her as Taliesin; how he becomes the bard for Elffin; and how Taliesin defends Elffin from the machinations of the king
Maelgwn Gwynedd.
Talulla f Irish (Rare)Anglicized form of the Old Irish name
Taileflaith,
Tuileflaith or
Tuilelaith, probably from
tuile "abundance" and
flaith "ruler, sovereign, princess". This was the name of an early saint, an abbess of Kildare.
Tanguy m Breton, FrenchFrom Breton
tan "fire" and
gi "dog". This was the name of a 6th-century Breton saint.
Tangwystl f Medieval WelshFrom Welsh
tanc "peace" and
gwystl "hostage, pledge". This name was borne by a mistress of the 13th-century Welsh ruler
Llywelyn the Great.
Taran m Welsh Mythology, PictishMeans
"thunder" in Welsh, from the old Celtic root *
toranos. It appears briefly in the Second Branch of the
Mabinogi. The name is cognate to that of the Gaulish god
Taranis. It was also borne by the 7th-century Pictish king Taran mac Ainftech.
Taranis m Gaulish MythologyDerived from the old Celtic root *
toranos meaning
"thunder", cognate with
Þórr (see
Thor). This was the name of the Gaulish thunder god, who was often identified with the Roman god
Jupiter.
Teague m IrishAnglicized form of
Tadhg. This name is also used as a slang term for an Irish Catholic.
Tegan f Welsh, English (Modern)Means
"darling" in Welsh, derived from a diminutive of Welsh
teg "beautiful, pretty". It was somewhat common in Australia, New Zealand, the United Kingdom and Canada in the 1980s and 90s. It was borne by an Australian character on the television series
Doctor Who from 1981 to 1984.
Tegid m WelshPossibly derived from Welsh
teg "beautiful, handsome", or possibly from the Roman name
Tacitus. This is the name of a lake in Wales, called Bala Lake in English. It also occurs in medieval Welsh legends as the husband of
Ceridwen.
Tegwen f WelshDerived from the Welsh elements
teg "beautiful, pretty" and
gwen "white, blessed". This name was created in the 19th century.
Tighearnach m Medieval IrishFrom Old Irish
Tigernach, derived from
tigerna meaning
"lord". This was the name of an Irish saint, the founder of the monastery at Clones in the 6th century. According to some tales of his life, he was taken by British pirates to the monastery of Rosnat in his youth, but he escaped and returned to Ireland.
Tighearnán m Medieval IrishFrom Old Irish
Tigernán meaning
"little lord", from
tigerna "lord" combined with a diminutive suffix. It was borne by a 6th-century saint who founded a monastery at Errew. It was also the name of a 12th-century king of Breifne.
Toirdhealbhach m Irish (Rare)From Old Irish
Tairdelbach meaning
"instigator", derived from
tairdelb "prompting". This name was borne by several medieval Irish kings.
Toutatis m Gaulish MythologyProbably derived from the old Celtic root *
toutā meaning
"people, tribe". This was the name of a Gaulish god who may have been regarded as the protector of the people or tribe.
Trahaearn m Medieval WelshMeans
"very much like iron", derived from Welsh
tra "very, over" prefixed to
haearn "iron". This name was borne by an 11th-century king of Gwynedd.
Treasa f IrishPossibly from Irish
treise meaning
"strength" or
treas meaning
"battle". It is also used as an Irish form of
Theresa.
Trevor m Welsh, EnglishFrom a Welsh surname, originally taken from the name of towns in Wales meaning
"big village", derived from Middle Welsh
tref "village" and
maur "large". As a given name it became popular in the United Kingdom in the middle of the 20th century, then caught on in the United States in the 1960s.
Túathal m Old IrishMeans
"ruler of the people", from Old Irish
túath "people, country" and
fal "rule". This was the name of a few Irish kings, including the legendary Túathal Techtmar.
Tudor 1 m WelshAnglicized form of the medieval Welsh name
Tudur, possibly from a hypothetical Celtic name *
Toutorīxs meaning "ruler of the people" (cognate with
Theodoric). As a surname it was borne by five monarchs of England beginning with Henry VII in the 15th century. These monarchs were descended from Owain ap Maredudd ap Tudur, a Welsh nobleman.
Tudwal m Welsh (Rare)From the Old Welsh and Breton name
Tutgual, derived from
tut "people, country" and
gual "ruler, leader". This was the name of a 6th-century Breton saint.
Tydfil f WelshAnglicized form of Welsh
Tudful, of unknown meaning. This was the name of a (probably legendary) saint who is supposedly buried in the town of Merthyr Tydfil in Wales. It is possible the saint was named after the town. She is said to have been one of the daughters of
Brychan Brycheiniog.
Uaithne m Medieval IrishPossibly from Old Irish
úaine meaning
"green". Alternatively, it may come from the name of the Irish tribe the Uaithni.
Ultán m Irish, Old IrishMeans
"of Ulster" in Irish. Ulster is a region in the north of Ireland. This name was borne by two 7th-century Irish saints.
Úna f Irish, Medieval IrishProbably derived from Old Irish
úan meaning
"lamb". This was a common name in medieval Ireland.
Uther m Welsh Mythology, Arthurian CycleFrom the Welsh name
Uthyr, derived from Welsh
uthr meaning
"terrible". In Arthurian legend Uther was the father of King
Arthur. He appears in some early Welsh texts, but is chiefly known from the 12th-century chronicles of Geoffrey of Monmouth.
Vaughan m Welsh, EnglishFrom a Welsh surname that was derived from
bychan (mutated to
fychan) meaning
"little".
Vercingetorix m GaulishMeans
"king over warriors" from Gaulish
wer "on, over" combined with
kingeto "marching men, warriors" and
rix "king". This name was borne by a 1st-century BC chieftain of the Gaulish tribe the Arverni. He led the resistance against Julius Caesar's attempts to conquer Gaul, but he was eventually defeated, brought to Rome, and executed.
Winifred f English, WelshFrom Latin
Winifreda, possibly from a Welsh name
Gwenfrewi (maybe influenced by the Old English masculine name
Winfred). Saint Winifred was a 7th-century Welsh martyr, probably legendary. According to the story, she was decapitated by a prince after she spurned his advances. Where her head fell there arose a healing spring, which has been a pilgrimage site since medieval times. Her story was recorded in the 12th century by Robert of Shrewsbury, and she has been historically more widely venerated in England than in Wales. The name has been used in England since at least the 16th century.
Wyn m WelshDerived from Welsh
gwyn meaning
"white, blessed".