The Alans (or Alani) were an Iranian nomadic pastoral people of antiquity.
The name Alan is an Iranian dialectical form of Aryan, a common self-designation of the Indo-Iranians. Possibly related to the Massagetae, the Alans have been connected by modern historians with the Central Asian Yancai and Aorsi of Chinese and Roman sources, respectively. Having migrated westwards and become dominant among the Sarmatians on the Pontic Steppe, they are mentioned by Persian and Roman sources in the 1st century AD. At the time they had settled the region north of the Black Sea, and frequently raided the Parthian Empire and the Caucasian provinces of the Roman Empire. In 215–250 AD their power on the Pontic Steppe was broken by the Goths.
Upon the Hunnic defeat of the Goths on the Pontic Steppe around 375 AD, many of the Alans migrated westwards along with various Germanic tribes. They crossed the Rhine in 406 AD along with the Vandals and Suebi, settling in Orléans and Valence. Around 409 AD they joined the Vandals and Suebi in the crossing of the Pyrenees into the Iberian Peninsula, settling in Lusitania and Carthaginiensis. The Iberian Alans were soundly defeated by the Visigoths 418 AD, and subsequently surrendered their authority to the Hasdingi Vandals. In 428 AD, the Vandals and Alans crossed the Strait of Gibraltar into North Africa, where they founded a powerful kingdom which lasted until its conquest by the Byzantine Emperor Justinian I in the 6th century AD.