Question: Who is Sancho Alfonso, 1St Count Of Alburquerque's paternal grandfather?
Sentence (from "Tirso de Olazábal, 1st Count of Arbelaiz"): Tirso de Olazábal y Lardizábal, 1st Count of Arbelaiz, 1st Count of Oria( 28 January 1842 – 25 November 1921), was a Spanish noble and Carlist politician.
Relevant evidence: No