Diego Lopez V de Haro
| Diego López V de Haro | |
|---|---|
Statue of Diego Lopez V by Mariano Benlliure.
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| Lord of Biscay | |
| Coat of arms |  |
| Reign | 1295–1310 |
| Predecessor | Henry of Castile |
| Successor | María II Díaz de Haro |
| Born | c. 1250 |
| Died | January 1310 Algeciras |
| Buried | Monasterio de San Francisco, Burgos |
| Noble family | Haro |
| Spouse(s) | Violant of Castile |
| Issue | |
| Father | Diego López III de Haro |
| Mother | Constanza de Bearne |
Diego López V de Haro, nicknamed el Intruso (c. 1250 – 1310), was a Spanish noble of the House of Haro and held the title of the Lord of Biscay which he took from the pretender to the title, John of Castile.
He further served in the capacity of Mayordomo mayor del rey and the Alférez del rey of Ferdinand IV of Castile. He was a major benefactor of the city of Bilbao, where he expanded the local fishing village and granted it the power to maintain its customs market free of any Portazgo (royal tribute) answerable only to the authority of the Lord of Biscay.
Diego López was the son of Diego López III de Haro and his wife, Constanza de Bearne. He eventually inherited the title of Lord of Biscay from his father after his sister and the usurper to the title, John of Castile. His paternal grandparents were Lope Díaz II de Haro, Lord of Biscay, and his wife, Urraca Alfonso de León, the illegitimate daughter of Alfonso IX of León. His maternal grandparents were Guillermo II de Bearne, the Viscount of Bearne, and his wife, Garsenda of Provence.
Amongst his siblings were Lope Díaz III de Haro, Lord of Biscay, Teresa de Haro, wife of Juan Núñez I de Lara, head of the House of Lara, and of Sancha Díaz de Haro. He was the great grandson of the king, Alfonso IX of León.
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