... Geoffrey of Monmouth is one of the earliest authorities for the story of Lear and the ungrateful daughters, whom he calls Gonorilla and Regan.  He gives the name of Cordeilla to the reserved but faithful daughter who could not pay lip service, but redeemed her father's kingdom when he was exiled and misused by her flattering sisters.  It was a very remarkable conception of character, even thus barely narrated, without the lovely endowments with which we have since learnt to invest the good daughter.  The sequel in Geoffrey's chronicle related, that after his kingdom was restored, old Leir died in peace at Leicester, and was buried by Cordeilla "in a certain vault which she ordered to be made for him under the river Sore, at Leicester, and which had been built originally under the ground to the honour of the god Janus; and here all the workmen of the city, upon the anniversary solemnity of that festival, used to begin their yearly labours."
    He further narrates that Cordeilla was dethroned by her nephews, and committed suicide in despair. (History of Christian Names, Yonge, 1884)