Andrew, I would very much like to exchange info!A quick run through what I know is:
John Rose (b1750s/60s?) married Ellen.They had four children that we know of: William b1780, Jane b1783, Elizabeth b1792, Thomas b1794.There is obviously a huge gap between Jane & Elizabeth so were there other siblings, or did some die young?
Elizabeth married George Mackereth b1787.They had four, possibly five or more children:Thomas R. b1814 is a question mark, Eleanor b1825, Elizabeth b1831, Agnes b1833 & George b1835.
Eleanor married and had at least two children.George married and had nine children!I have more info on both lines.Elizabeth ended up in a workhouse after her father died and had four illegitimate children, two of whom died in the workhouse.
Agnes also had two illegitimate children: Hannah b1853 and William Brockbank Mackereth b1857.He married Eliza Read and had three, possibly four, children one of whom was William A. Mackereth b1892.William married Annie King and had one daughter Cicely b1920 who is my Grandma in law!!
Does this tie in with your tree?We would love to know more about your descent from George.