Saint Pompeia, also known by the names Alma Pompeia or Aspasia, was a legendary holy woman from the 6th-century region of Domnonia. According to tradition, she was the sister of King Riwal II and was reportedly a wife of King Hoel Mawr. Following a period of exile in Britain, she returned to her husband's realm alongside her children, Saint Scaeva and Saint Tudwal. She eventually settled near the monastery established by her son, residing in the area where the church of Langoat now stands.