Who is the lady mentioned - Amazing Grace - in memory?

The "lady" mentioned in "Amazing Grace" refers to the hymn's author, John Newton, who wrote the lyrics in the 18th century. The hymn reflects his personal transformation from a life of sin and slavery to one of faith and redemption. While there isn't a specific lady associated with the hymn, it is often interpreted as a tribute to the grace of God that saves and transforms individuals, regardless of their past.