John Duvall and Hester Ijams

HW Newman mentions a liason between John Duvall and Hester Ijams which produced three children between 1700 and 1710.
One of the children died in infancy, but what of the other two?A court record indicates that John deeded a piece of land to Hester Ijams for her and the children, with knowledge of the wife.What happened to the two surviving children; Elizabeth and Anne?What surname did they use?Ijams, Duvall or Nicholson, which is the name of the fellow Hester married after John Duvall died.All the above info from Newman.