- Marriage: Letitia 1190,1192
- Died: After 1357, Ashbourne Hall, Derbyshire, England 1192
Noted events in his life were:
• Background Information. 1192
John Cockayne, one of the three sons of William and Sarah Cockayne, married a daughter of Sir William de Kniveton of Bradley, co. Derby. By this marriage, he had a son, also named John. This was Sir John Cockayne of Ashbourne, 1357, M.P. for the county of Derby who married Letitia. Letitia survied Sir John and remarried a member of the family of Fitz Herbert of co. Derby, 1360. Letitia brought into the Cockayne family the manor of Clifton, near Ashbourne, with other propery.
~Cockayne Memoranda, p. 6
• Background Information. 1190
William Cockeyn, of Ashburne, in 1299, by Sarah, his wife, had issue, John living in Ashburne, 1305, father of John Cockayne, who by Letitia his wife, was father of another John Cockney, a person of great distinction.
~Burkes's A Genealogical History of the Dormant: Abeyant, Forfeited, and Extinct Peerages of the British Empire, p. 126
John married Letitia 1190.,1192 (Letitia died after 1360 in England 1192.)