Alena, also known as Alène or Alina, is a Christian saint who, if historical, was martyred around the year 640. She is sometimes referred to as Alena of Forest, or Alena of Brussels, having died in Forest, Belgium, which is now one of the nineteen municipalities of Brussels.

Forest or Vorst, is one of the 19 municipalities of the Brussels-Capital Region, Belgium. Located in the southern part of the region, it is bordered by Anderlecht, Ixelles, Uccle, and Saint-Gilles, as well as the Flemish municipality of Drogenbos. In common with all of Brussels' municipalities, it is legally bilingual (French–Dutch).