Hafren (Old Welsh Habren, but also Sabre, Romanized to Sabrina) was the princess whom Geoffrey of Monmouth, ii. 5, represents drowned in the river Severn that was named after her. Her story is tied to that of a pre-celtic Spirit of that river by the same name, thus the name corresponding to Welsh Hafren occurs in Ireland in the form of Sabrann, an old name of the river Lee that flows through Cork. The Severn is the name of a river in the United Kingdom. ...

The Story is that King Locrine fell in love with princess Estrildis of the Huns who invaded Britain under chief Humber following the death of Brutus of Troy. However, Locrine was already engaged to Princess Gwendoline daughter of Cornwall. Although Locrine eventually fathered an heir called Madan with his Queen Gwendoline, he could not give up his love for the Hun princess Estrildis and he also fathered a daughter with her called Hafren. After Cornwall died, Locrine left his queen to live with Estrildis and his daughter Hafren. Enraged at the slight, Gwendoline raised a Cornish army against Locrine and killed him in battle. Estrildis and her daughter Hafren were drowned in the river Severn.