- Born: Ashbourne Hall, Derbyshire, England
- Marriage: Alice de Dalbury 1192
- Died: Bef 1299, Ashbourne Hall, Derbyshire, England
Noted events in his life were:
• Background Information. 1192
The earliest ancestor of the family who can be traced with certainty is John Cockayne of Ashbourne circa 1150. His son, Andreas Cockayne of Ashbourne, 1154 to 1189, was father of William Cockayne of Ashbourne, 1241, whose wife's name was Sarah; their son, William Cockayne of Ashbourne married č, daughter of Hugh de Dalbury, who survived him, and remarried Hugh Bonstivant of Thorpe, living 1299.
~Cockayne Memoranda, p. 4
William married Alice de Dalbury, daughter of Hugh de Dalbury and Unknown.1192 (Alice de Dalbury died after 1299.)