Sadb f Irish Mythology, Old IrishProbably derived from the old Celtic root *
swādu- meaning
"sweet". This was a common name in medieval Ireland. In Irish mythology Sadb was a woman transformed into a deer. She was the mother of
Oisín by
Fionn mac Cumhaill.
Saoirse f IrishMeans
"freedom" in Irish Gaelic. It was first used as a given name in the 20th century.
Saraid f Irish, Irish MythologyFrom Old Irish
Sárait, derived from
sár meaning
"excellent". This was the name of a daughter of the legendary high king of Ireland, Conn of the Hundred Battles.
Scáthach f Irish MythologyMeans
"shadowy" in Irish. In Irish legend this was the name of a warrior woman. She instructed
Cúchulainn in the arts of war, and he in turn helped her defeat her rival
Aoife.
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.
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.
Shannon f & m EnglishFrom the name of the River Shannon, the longest river in Ireland, called
an tSionainn in Irish. It is associated with the legendary figure
Sionann and is sometimes said to be named for her. However it is more likely she was named after the river, which may be related to Old Irish
sen "old, ancient". As a given name, it first became common in America after the 1940s.
Shaw m English (Rare)From a surname. As an English surname it is derived from Old English
sceaga meaning
"thicket". As a Scottish surname it is derived from the Gaelic byname
Sitheach meaning
"wolf".
Sheridan m & f EnglishFrom an Irish surname (Anglicized from Irish Gaelic
Ó Sirideáin), which was derived from the given name
Sirideán possibly meaning "searcher".
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.
Sullivan m English, FrenchFrom an Irish surname, the Anglicized form of
Ó Súileabháin, itself from the given name
Súileabhán, which was derived from Irish
súil "eye" and
dubh "dark, black" combined with a diminutive suffix. This name has achieved a moderate level of popularity in France since the 1970s. In the United States it was rare before the 1990s, after which it began climbing steadily. A famous fictional bearer of the surname was James P. Sullivan from the animated movie
Monsters, Inc. (2001).
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.
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.
Taryn f EnglishProbably a feminine form of
Tyrone. Actors Tyrone Power and Linda Christian created it for their daughter Taryn Power (1953-).
Teagan f English (Modern)Variant of
Tegan. It also coincides with a rare Irish surname
Teagan. This name rose on the American popularity charts in the 1990s, probably because of its similarity to names like
Megan and
Reagan.
Teague m IrishAnglicized form of
Tadhg. This name is also used as a slang term for an Irish Catholic.
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.
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.
Tyrone m English, African AmericanFrom the name of a county in Northern Ireland, which is derived from Irish Gaelic
Tir Eoghain meaning "land of
Eoghan". This name was popularized by American actor Tyrone Power (1914-1958), who was named after his great-grandfather, an Irish actor.
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.
Una f EnglishAnglicized form of Irish
Úna or Scottish
Ùna. It is also associated with Latin
una, feminine form of
unus meaning
"one". The name features in Edmund Spenser's poem
The Faerie Queene (1590).
Vivian m & f English, Swedish, Norwegian, DanishFrom the Latin name
Vivianus, which was derived from Latin
vivus "alive". Saint Vivian was a French bishop who provided protection during the Visigoth invasion of the 5th century. It has been occasionally used as an English (masculine) name since the Middle Ages. In modern times it is also used as a feminine name, in which case it is either an Anglicized form of
Bébinn or a variant of
Vivien 2.