Tiobóid na Long Bourke, 1st Viscount Mayo

Tibbot na Long Bourke (1567 – 18 June 1629), aka Theobald Bourke, was a clan chief of the MacWilliam Burkes of County Mayo in Ireland, was a Member of the Irish House of Commons and was later created the first Viscount Mayo. His successful life followed, and usefully illustrates, the difficult transition for Irish aristocrats from the traditional Gaelic world during the Tudor conquest of Ireland.

Bourke's name had varying spellings such as "Teabóid" or "Tepóitt" in medieval Irish. Tibbot derived from Thibault, the French for Theobald; and "na Long" meant "of the ships", as he was born on a ship. This was usually rendered in Tudor English as: Tibbott or Tibbot na Long.

Tibbot's Irish ancestors started with William de Burgh who was granted the overlordship of Connacht in 1215 by John Lackland. William's son Richard (d.1243) took actual possession of much of the province in the 13th century. His descent then divided their lands into:

These branches held their lands against Gaelic and Norman opponents in the following centuries and were typical of the Hiberno-Norman families who intermarried locally and had adopted Gaelic culture by the 1400s (see Gaelic Resurgence).

His mother was the famous pirate queen Grace O'Malley (1530–1603) and his father was Risdeárd an Iarainn Bourke (d.1583), who was her second husband, and a senior member of the Lower MacWilliam Burke clan. Risdeárd an Iarainn ("Iron Richard") was so called either from wearing chain mail or from his iron works. Both parents owned lands along the west coast of County Mayo. Tibbot was born at sea, supposedly just before his mother's fleet engaged in a sea battle with Barbary pirates.

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