William of Nassyngton (died 1354) was an English clerical administrator and translator from Nassington in Northamptonshire.
The poem consists of a commentary on the Lord's Prayer, 16,000 lines long.
It covers analysis of the Ten Commandments, the Creed, the divine and cardinal virtues, the gifts of the Holy Ghost, the seven deadly sins, the Beatitudes, and the heavenly rewards.
It derives in part from a French work in prose: Somme le roi, dated 1279.
[1] William of Nassyngton came from a family of ecclesiastical administrators from Nassington, Northamptonshire.