Bill Marcroft has asked about the London Marcrofts. Here goes!
Bill says he has traced them back to 1783. This must be the marriage of Ashton Marcroft to Ann Tucker. They had at least 6 children, one of whom was also Ashton. This son married Sarah Learner in 1805. They had at least 5 children, two of whom were also called Ashton (but one of them died and they appear to have named the next boy Ashton - must have been a family tradition). Another of the sons was James Henry Marcroft. In 1841 he married Elizabeth Lewis. One of their children was Harriett Marcroft and she married John Burke (variously spelt Birks or Birke) in 1876. They were my great grandparents. One of their daughters Alice was my grandmother who married Edward Ernest Turner. Their son was also Edward Ernest Turner and he was my father. For more or less the whole period they all lived in or near London. I now live in Yorkshire.