House of Olaso
The House of Olaso is a Basque noble family originally from Trapagaran. Jośe Rufino de Olaso y de la Puente was granted the rank of Marquess by Pope Pius X on 15 January 1914. His son Luis Saturnino Julián de Olaso y Madaria, the 2nd Marquess, obtained the formal recognition of the title in the Kingdom of Spain on 13 March 1920. The 4th Marquess of Olaso was a shipowner in Bilbao.
Jośe Rufino de Olaso's older brother Julián de Olaso emigrated to Argentina where he became a wealthy business magnate. He then returned to Spain, where he settled in Bilbao and became the Argentine Consul.