Rechiar or Flavius Rechiarius was the third Suevic king of Gallaecia, from 448 until his death, and also the first one to be born in Gallaecia. He was one of the most innovative and belligerent of the Suevi monarchs. Hydatius, the contemporary bishop and chronicler from Galicia who is the sole contemporary source for biographical details of Rechiar, established his reputation as that of a barbarian with little sense of Roman law, culture, or custom; accusations already discredited, but very common at that time.

The Suebi or Suebians were a large group of Germanic peoples originally from the Elbe river region in what is now Germany and the Czech Republic. In the early Roman era they included many peoples with their own names such as the Marcomanni, Quadi, Hermunduri, Semnones, and Lombards. New groupings formed later, such as the Alamanni and Bavarians, and two kingdoms in the Migration Period were simply referred to as Suebian.