Tirso de Olazábal y Lardizábal

Tirso de Olazábal y Lardizábal
Tirso de Olazábal dressed as "Gentilhombre" wearing the insignia of the Order of the Golden Fleece and other decorations.
Born	28 January 1842 , Irun, Spain
Died	25 November 1921 San Sebastián, Spain
Noble family	House of Olazábal
Religion	Roman Catholicism
Occupation	Politician

Tirso de Olazábal y Lardizábal, Count of Arbelaiz (28 January 1842 – 25 November 1921), was a Spanish noble and Carlist politician.

Tirso Julián Francisco José Ramón María de Olazábal y Lardizábal was born into a distinguished and aristocratic Basque family, with many of its members recorded in history of the region. The Olazábal family is reputed to be one of the first settlers of the province of Guipúzcoa, taking part in the exploits of Cantabria. They also contributed to the restoration of Spain with Pelagius of Asturias and accompanied Ferdinand the Saint in the Siege of Seville and in several incursions into Andalusia. Considered to be a chief lineage or a lineage of "Elder Relatives" (Parientes Mayores) of Guipúzcoa, its founders owned the fief of Alzo, where they possessed the patronat of San Salvador Church. The first official document of the province of Guipúzcoa, dated 1025, attributes to the Olazábal family the property of 300 caseríos (villages) in the place of Alzo.

Tirso's ancestors can safely be traced back to the 14th century. More recently, his great-grandfather, Domingo José de Olazábal y Aranzate, was alcalde of Irun in 1767 and 1778. His son and Tirso’s grandfather, José Joaquín Cecilio María de Olazábal y Murguía (1763–1804), served in the navy and is listed as teniente de fragata. His oldest son and Tirso’s father, José Joaquín María Robustiano de Olazábal y Olaso (1794–1865), between 1828 and 1845 was many times elected to the . He is better known as a cartographer, which suggests that he was also a military, serving either in the army or in the navy. In 1836 together with Francisco de Palacios he published a map of Guipúzcoa, re-worked later in another version, issued in 1849.