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In page Pope Alexander VI:

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Alternatively, it has been argued that Rodrigo's father was Jofré de Borja y Escrivà, making Rodrigo a Borja from his mother and father's side.[2] However, his children were known to be of Llançol paternal lineage. Some revisionists suggest that the confusion is attributed by attempts to connect Rodrigo as the father of Giovanni (Juan), Cesare, Lucrezia and Gioffre (Jofré in Valencian), who were surnamed Llançol i Borja.[3]