Ruy Gonzlez de Clavijo (died 2 April 1412) was a Castilian traveler and writer. In 1403-05 Clavijo was the ambassador of Henry III of Castile to the court of Timur, founder and ruler of the Timurid Empire. A diary of the journey, perhaps based on detailed notes kept while traveling, was later published in Spanish in 1582 (Embajada a Tamorln) and in English in 1859 (Narrative of the Embassy of Ruy Gonzalez de Clavijo to the Court of Timour at Samarcand AD 1403-6).

Henry III of Castile (4 October 1379 – 25 December 1406), called the Mourner (Spanish: Enrique el Doliente, Galician: Henrique o Doente), was the son of John I and Eleanor of Aragon. He succeeded his father as King of Castile in 1390.