Constantine I of Britain

Constantine I (4 April 878 - 26 May 960) was King of Britain from 906 until 960, he was Lord of London from 905 until 906 when he became King.

Family
Constantine married Helen of Doukechaine (883 - 2 June 954)

He had 2 children
 * Constantine II of Britain (29 August 910 - 972)
 * John of Doukechaine (935 - 10 May 1021)