John Blacknall (1583 – 21 August 1625) was a landowner and benefactor to Abingdon-on-Thames.
[1] William Sr. had originally bought the Abbey land after the Dissolution of the Monasteries.
He married a daughter of a gentry family (the Blagraves of Bulmershe) and had little interest in the business selling the mills but continued to acquire more land.
[5] He died of the plague on 21 August 1625 and has a Monument with effigies in St Nicolas Church, Abingdon.
[4] By his will dated 9 August 1625 he bequeathed 40 shillings per annum for the schoolmaster of Abingdon School.