List of nicknames of European royalty and nobility: T

• Tadhg, King of Connacht of The Three Towers
• Tahg O'Neill, King of Ulster Tahg of the Glens
• Tairrdelbach mac Ruaidri Ua Conchobair the Great 1
• Tamar of Georgia the King of Kings and Queen of Queens, the Saint
• Tancred of Sicily Tancred of Lecce 2, Tancredulus 3
• Teige O'Brien, King of Thomond (d. 1466) am Chomhard
• Teige, King of Desmond, 1391–1440 Teige of the Monastery (na Manistreach)
• Teige, King of Thomond, 1258–1259 Caeluisce
• Teige, King of Thomond, 1459–1460 Teige of the Castle of Chomhaid (an-Chomhaid)
• Theobald I of Blois the Cheat, the Cheater, the Trickster
• Theobald I, Duke of Lorraine the Fair, the Handsome, the Handsome Duke
• Theobald I of Navarre, le Faiseur de Chansons 4, the Chansonnier, the Great, the Posthumous, the Minstrel,the Troubadour''
• Theobald II of Champagne the Great
• Theobald II of Navarre the Young
• Theobald II, Duke of Lorraine the Generous, the Liberal, the Magnanimous
• Theobald III of Champagne the Troubadour-Prince 5
• Theobald V of Blois the Good
• Theobald (d.928), Count of Blois the Old
• Theodore II of Beloozero (13??–1380) the Old
• Theodore of Smolensk (d.1299) the Black
• Theodoric of Guelders Theodoric of the Veluwe
• Theodoric the Great Dietrich of Berne 6, Flavius Theodoricus, the Barbarian Champion of Civilization 7, the Great
• Theodosios III the Orthodox 8, the Reluctant 9 10
• Theodosius I the Great 11
• Theodosius II the Lesser, the Younger
• Theodosius III of Abkhazia the Blind, the Sorrowed
• Théophile Corret de la Tour d'Auvergne the First Grenadier of France 12
• Thibaud, Lord of Montlhery Fille d'Etoupe
• Thibaud of Montmorency the Towhead, the Burlap-Head, Tête d'Étoupe 13
• Thierry, Count of Flanders Thierry of Alsace
• Thierry II, Duke of Lorraine the Brave
• Thierry III, Count of Montbeliard, 1227–1283 the Great Baron
• Thierry, Bishop of Verdun, 1047–1088 the Great
• Thierry of Lorraine, Lord of Autigny (d.1241), son of Ferry I of Lorraine Thierry d'Enfer, the Devil
• Thomas I of Savoy the Beloved of the Commune l’Ami des Communes 14, the Ghibelline 15
• Thomas II of Savoy Thomas of Flanders
• Thomas II Preljubović the Albanian-Slayer
• Thomas, Earl of Norfolk Thomas of Brotherton
• Thomas, 2nd Baron Vaux of Harrowden (d. 1562) the Poet
• Thomas, 2nd Earl of Lancaster Thomas of Lancaster, the Martyr
• Thomas of Woodstock, 1st Duke of Gloucester
• Thomas-Alexandre Dumas the First Soldier of the World 16
• Thomas Berkeley, 6th Lord Berkeley the Hopeful 17
• Thomas Burke the Athlete
• Thomas Butler, 3rd Earl of Ormonde Black Tom 18
• Thomas Butler, 7th Earl of Ormonde "The Earl of Wool" 19
• Thomas Butler, 10th Earl of Ormonde the Black Earl 20
• Thomas Cavendish the Navigator
• Thomas Cochrane, 10th Earl of Dundonald the Seawolf 21
• Thomas de Berkeley the Temporizer, the Observer 22 23
• Thomas de Berkeley, 1st Baron Berkeley the Wise 24
• Thomas de Berkeley, 3rd Baron Berkeley the Rich 25
• Thomas de Berkeley, 5th Baron Berkeley (1351-1418) the Magnificent
• Thomas de Cantilupe the Saint
• Thomas de Vere, 8th Earl of Oxford the Fighting Earl of Oxford, the Fighting Vere 26
• Thomas FitzGerald, 2nd Baron of Desmond a Nappagh, an-Apa, Simiacus 27
• Thomas FitzGerald, 7th Earl of Kildare (d.1478) the Great Earl FitzGerald
• Thomas FitzGerald, 10th Earl of Kildare Silken Thomas (Tomas an tSioda) 28
• Thomas FitzGerald, 11th Earl of Desmond the Bald, the Victorious 29 30
• Thomas FitzGerald, 18th Knight of Glin the Snub-Nosed 31
• Thomas FitzGerald, Lord of Decies (1261–1298) Simiacus, the Crooked Heir 32
• Thomas fitzJames FitzGerald, 7th Earl of Desmond Thomas of Drogheda 33
• Thomas Howard, 2nd Duke of Norfolk the Victor of Flodden Field 34
• Thomas Howard, 21st Earl of Arundel The Collector
• Thomas Pelham-Holles, 1st Duke of Newcastle-upon-Tyne Hubble-Bubble 35
• Thomas Wentworth, 1st Earl of Strafford Black Tom Tyrant 36
• Thomas the Slav the Slav, rival Emperor of Byzantium, 820-823
• Thorfinn Sigurdsson the Raven Feeder
• Thorgils Skarthi the Hare-Lipped
• Thorkel the Terrible
• Thorkell the Tall Thorkild Høje 37, Sprakalaeg
• Thorfinn I Einarsson, Earl of Orkney, 963–976 the Skull-Splitter, the Skull-Cleaver
• Thorfinn the Black, the Dane, the Great, the Mighty 38
• Thori, Thorir, Jarl of More the Silent, son of Ragnvald Eysteinsson
• Thurstan, Viscount of Avranches le Goz 39
• Thyra, Queen of Denmark the Prince of Denmark 40, Thyra Dannebod Queen of Denmark 41
• Tiberios III, Byzantine Emperor Apsimaros, Apsimeros
• Tiberius the Emperor of Capri 42 43, the Imperial Machiavelli 44, the Prince of Hypocrites 45
• Titus the Darling of Mankind , the Delight of Mankind 46
• Torf de Harcourt, Lord of Turgueville the Rich 47
• Toirdhealbhach Ua Briain the Magnificent 48
• Trajan the Adoptive Emperor
• Tuathal Teachtmhar "The Legitimate" 49
• Turgesius of Norway the Tyrant 50
• Turlough III, King of Thomond, 1375-1400 the Bald 51
• Turlough IV, King of Thomond, 1444-1459 the Soft, Bog 52
• Turlough V, King of Thomond, 1496-1498 the Younger 53
• Turlogh Mor O'Brien, King of Thomond (d.1306) of the Triumphs
• Turlough O'Brien, King of Thomond (d.1528) the Brown
• Turlough Oge, King of Thomond, 1496–1499 Gilla Dubh
• Turgut Reis the Drawn Sword of Islam 54 55

• "Three Collas":
  • Cairill, a.k.a. Colla the Noble (Uais), High King of Ireland
  • Aed, a.k.a. Colla the Stammerer (Menn), High King of Ireland
  • Muiredach, a.k.a. Colla Fo Crith, High King of Ireland

Regnal Name

• Theobald I, Count of Champagne: Theobald III, Count of Blois
• Theobald IV, Count of Blois: Theobald II, Count of Champagne
• Theobald V, Count of Blois;; Theobald III, Count of Champagne
• Theobald IV, Count of Champagne: Theobald I of Navarre
• Theobald VI, Count of Troyes: Theobald I of Navarre
• Theobald V, Count of Champagne: Theobald II of Navarre
• Theobald VII, Count of Troyes: Theobald II of Navarre