HAFREN

'Hafren' (Old Welsh 'Habren', but also 'Sabre', Latinised to 'Sabrina') is the name of a semi-mythical person from pre-Roman Britain whose name is the root of river names in Great Britain and Ireland.
Legend has it that she was the princess whom Geoffrey of Monmouth, 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 the city of Cork.
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.