Montcada’s family had in Middle Ages the Baronia d’Aitona in the land known as Baix Segre, in Lleida. His properties included the villages of Serós, Aitona, Mequinensa, Faió, Vallobar and Maials. This part of the family, who lived in Lleida, is really unknown. Documents from the Arxiu Ducal de Medinaceli a Catalunya have shown new members of this part of the family unknown since now. This new information has allowed to complete the genealogical trees of the Montcada’s family in Lleida.