Juan Núñez I de Lara y León, also known as "el Gordo" or "the Fat", was a Spanish noble. He was the head of the House of Lara, Lord of Lerma, Amaya, Dueñas, Palenzuela, Tordehumos, Torrelobatón, and la Mota. He was further known as Señor de Albarracín through his first marriage with Teresa Álvarez de Azagra.

Diego López V de Haro, nicknamed el Intruso, was a Castilian 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.