In spite of various biographical details having been created, there are no unambiguous records of his existence except in the patronymics of his sons, García and Íñigo Jiménez, indicating a father named Jimeno.
[1] In 850, the French court received envoys from Induo and Mitio, "dukes of the Navarrese", and it has been supposed that these names represent those of Íñigo Arista and Jimeno,[2] but Sánchez Albornoz argued against the latter identification.
[3][4] The location of his hypothetical principality has been placed around Álava, where a count Vela Jiménez, traditionally thought to have been his son (again based on patronymic), held sway.
No record of his wife remains, although historian Justo Pérez de Urbel has suggested that he was the unnamed prince of Pamplona who married Leodegundia Ordoñez, daughter of King Ordoño I of Asturias.
[6] Sánchez Albornoz harbors no doubts that Leodegundia married a king of Pamplona, as mentioned in the "Códice de Roda" when she is called Domna Leodegundia Regina, nevertheless, he believes that she would have married a reigning king, not Jimeno of Pamplona, who would also have been much too old for her and that, in any case, the most likely candidate would have been either García Íñiguez or his son Fortún Garcés.