Luis Dionisio de Lezama Leguizamón y Sagarminaga (1865-1933) was a Spanish entrepreneur, Vascologist and politician. As a businessman he kept developing the family-owned mining conglomerate, which controlled part of iron ore, carbon, fluorite, anhydrite and plaster exploitation in Vascongadas and Asturias. As a linguist he was a longtime executive of Sociedad de Estudios Vascos, owned one of the largest collections of Basque literature and contributed few scientific works himself. As a politician he supported the Traditionalist cause, first as a Carlist, in 1919-1931 as a breakaway Mellista, and then again as a Carlist; in the early 1930s he held the provincial party jefatura in Biscay.
