The old church records show that in 1290…

When David, Earl of Huntingdon, died in 1219 in his manor of Yardley, the inheritance went to his son John, who died without issue, and it was then divided among John’s three sisters. Yardley went to the son of his youngest sister Ada, Henry Baron Hastings, and became known as Yardley-Hastings. There is no mention of Grendon, but the old church records show that in 1290, the living of the parish church was in gift of Robert the Bruce, Lord of Annandale, who was the son of the second sister Isabel, so he must have become lord of the manor of Grendon.

In 1315, the appointment of a new parish priest, Robert de Hurle, was ratified by King Edward II because the then lord, another Robert the Bruce, was abroad. This was an understatement, as this Robert the Bruce had become king of Scotland, and he was at war with England, and unable to perform feudal services to the king of England; he was subsequently deprived of his English lands and titles.