Euin (died 595), also Ewin or Eoin, is the first Lombard Duke of Trent (from 569) during the Rule of the Dukes, an interregnum (575–585) during which the Kingdom of Italy is ruled by its regional magnates, the dukes of the thirty or so cities.
Euin participates in several significant wars during his long reign.
The primary source for his career is Paul the Deacon's Historia Langobardorum.
