Íñigo Fernández de Velasco (1462–17 September 1528), 2nd Duke of Frías, Grandee of Spain, and Constable of Castile (Spanish: Don Íñigo Fernández de Velasco y López de Mendoza, segundo duque de la villa de Frías, cuarto conde de Haro, octavo Condestable de Castilla, mayorazgo y señor de la Casa de Velasco, Caballero del Toisón de Oro), was a Spanish nobleman.
Fernández de Velasco was the son of Pedro Fernández de Velasco and of Mencía de Mendoza y Figueroa. He inherited the titles from his older brother Bernardino, who had no legitimate male issue. He married María de Tovar, Lady of Berlanga, with whom he had six children.
Castro Pereira Mouzinho de Albuquerque e Cunha, Fernando de (1995). Instrumentário Genealógico - Linhagens Milenárias (in Portuguese). pp. 329–30.
Costa Felgueiras Gaio, Manuel José da. Nobiliário das Famílias de Portugal (in Portuguese). Vol. VII. Portugal: Beltroens.
Hobbs, Nicolas (2007). "Grandes de España" (in Spanish). Retrieved 15 October 2008.
Sousa, Dom António Caetano de (1946). História Genealógica da Casa Real Portuguesa (in Portuguese). Vol. VI (2ª Edição ed.). Coimbra, Portugal: Atlântida-Livraria Editora, Lda. p. 323.
Instituto de Salazar y Castro. Elenco de Grandezas y Titulos Nobiliarios Españoles (in Spanish). periodic publication.
