Saint Elen (Welsh: Elen Luyddog, lit. "Helen of the Hosts"), often anglicized as Helen, was a late 4th-century founder of churches in Wales. Traditionally, she is said to have been a daughter of the Romano-British ruler Eudaf Hen (Octavius) and the wife of Macsen (Magnus Clemens Maximus), the 4th-century emperor in Britain, Gaul, and Spain who was killed in battle in 388.