Julio de Urquijo e Ibarra, Count of Urquijo (1871-1950), in Basque self-styled as Julio Urkixokoa, was a Basque linguist, cultural activist, and a Spanish Carlist politician. As a Traditionalist deputy he twice served in the Cortes, during the terms of 1903-1905 and 1931-1933, though the climax of his political activity fell on the late Restoration period. As a scientist he was the moving spirit behind setting up numerous vascologist institutions, especially Revista Internacional de Estudios Vascos (1907) and Sociedad de Estudios Vascos (1918). Himself he specialized in Basque paremiology and bibliography. He opposed academy-driven unification of Basque dialects and preferred to wait until standard Basque emerges naturally.

Tirso de Olazábal y Lardizábal, 1st Count of Arbelaiz, 1st Count of Oria, was a Spanish noble and Carlist politician.