That derivation goes back to the 13th-century De rebus Hispaniae.Bibliotheca Hispana Vetus vol. 2 (1788), p. 387. In the 14th century, Ibn Khaldun derived the name from al-Fandalus, the Vandals. Reinhart Dozy (1860) recognized the theory's shortcomings but still accepted it and suggested that geographically, it originally referred only to the harbour (Iulia Traducta, probably present-day Algeciras) from which the Vandals departed Iberia in 429 for North Africa, where they would establish the Vandal Kingdom (435–534). The first edition of the Encyclopaedia of Islam in 1913 adopted Dozy's view, and it became the mainstream account in 20th-century scholarship.Bossong 2002, p. 150. R. P. Dozy, Recherches sur l'histoire et la littérature des Arabes d'Espagne pendant le Moyen-Age (1881), p. 303.
