TIERNAN
Tiernan is a surname of Gaelic origin, derived from the personal name Tighearnán which translates literally as “little lord” or “little master.” The root tighearn itself means “lord” or “master,” a term that carried connotations of authority and respect within early Irish society.
The surname appears in archaic forms such as O'Tiernan, MacTiernan, and McTiernan. These prefixes reflect traditional Irish patronymic practices, with “Mac” indicating “son of” and “O” indicating “grandson” or “descendant of”. The name is therefore highly patrilineal, signalling descent from an ancestor who held a position of leadership or chieftainship.
Two principal septs of the name historically flourished. The first was situated in the Ulster county of Cavan and was a branch of the great O'Rourkes, who were styled Lords of Breffny. This sept produced numerous chiefs of Teallach Donnchadha, the modern area of Tullyhunco in County Cavan, and the name can still be found there today, usually without the prefix “Mac”. The second sept was located in north‑eastern County Roscommon, where it held land during medieval times. This line was descended from Tiernan, the grandson of Turlough Mor O'Connor, High King of Ireland (1119‑1156).
Variations of the spelling of Tiernan include Tierney, Kiernan, Tiernen, Tynan, Teernan, Tiernon, Tyernan, Ternan, and others. These differences often arise from anglicisation of the Gaelic original and regional dialectal pronunciations. Despite the diversity of spellings, they all retain the same core meaning of a “little lord”.
The surname remains most common in Ireland today, particularly in the counties of Cavan, Leitrim, Monaghan, Mayo, and Sligo. Its prevalence in these areas reflects the historical territory of the ancient Breffny, where the Tiernan clan once held power until the seventeenth century. In addition, substantial numbers of people bearing the name migrated to the United States, the United Kingdom, Canada, and Australia during the nineteenth‑century famine, with twenty‑six individuals recorded as arriving in New York between 1846 and 1851.
The Tiernan coat of arms is described as an ermines shield with two red lions passant. According to the earliest recorded evidence, the spelt form MacThighearnain is found in the “Annals of the Four Masters” of County Cavan, dated circa 1250, during the reign of King Henry 111 of England, known as “The Frenchman”, 1216‑1272. This record demonstrates the long presence of the clan within the Irish historical record.
In contemporary times the surname continues to be borne by many individuals of Irish descent worldwide. They often maintain a connection to their cultural heritage while contributing to fields as varied as the arts, sport, and politics. The enduring presence of the name underscores its strong historical roots and the importance of lineage in Irish naming traditions.
Typical given names associated with the Tiernan surname
Male
- Andrew
- David
- James
- John
- Kevin
- Mark
- Michael
- Paul
- Peter
- Richard
- Sean
Female
- Alyson
- Caroline
- Claire
- Elizabeth
- Helen
- Joan
- Joanne
- Laura
- Margaret
- Mary
- Nicola
- Sarah
- Sharon
- Susan
Similar and related surnames
- Ternan
- Tearnan
- Ternant
- Darnin
- Derounian
- Dornan
- Dornin
- Dornon
- Doronin
- Doronina
- Dourneen
- Drannan
- Draynan
- Drenan
- Drennan
- Drennen
- Drennon
- Drenon
- Drinan
- Drinnan
- Drinnen
- Drinnon
- Drinon
- Drynan
- Durnan
- Durneen
- Durnen
- Durnian
- Durnien
- Durnin
- Durnion
- Tehranian
- Teirnay
- Ternahan
- Ternay
- Ternent
- Ternnent
- Ternon
- Terrinoni
- Tierman
- Tiernay
- Tirnann
- Tornan
- Tournant
- Tournon
- Treinen
- Trenan
- Trenine
- Trunnin
- Trunnion
- Turnan
- Turnant
- Turnen
- Turnhan
- Turnon
- Turunen
Related and similar names are generated algorithmically based on the spelling, and may not necessarily share an etymology.
How to communicate the surname Tiernan in...
Braille
⠞⠊⠑⠗⠝⠁⠝
Morse
-....-.-..--.
Semaphore
There are approximately 1,155 people named Tiernan in the UK. That makes it roughly the 6,606th most common surname in Britain. Around 18 in a million people in Britain are named Tiernan.
Surname type: From given name or forename
Origin: Celtic
Region of origin: British Isles
Country of origin: Ireland
Religion of origin: Christian
Language of origin: Gaelic
Famous people named Tiernan
- Andrew Tiernan - Actor
- The murder of Leanne Tiernan - Convicted murderer and rapist
- Fergus Tiernan - Scottish football player
Names and descriptions courtesy of Wikipedia, and may contain errors. This is not intended to be an exhaustive list of every famous person with this name.