Thank you for this, it's extremely useful. I've put something about Jonathan's 3rd son on the other thread. The possible adopted child I was thinking about is the Eleanor Lloyd who was a witness at William Haden Richardson's second marriage in 1848. Sarah Lloyd didn't so far as I know have a sister of that name so a possible explanation would be that she was a child of Sarah's brother Isaiah born around the time of his death in 1832 and adopted by Sarah and Jonathan. This seems to be the only mention of her in the record.
Further to George Lloyd of Lloyd and Summerfield I discovered that he was the son of the Rev. Thomas Lloyd vicar of Albrighton. His wife Rachel Biddle was the granddaughter of Sampson Lloyd the banker and they all seem to come from a background of wealthy Welsh gentry. A bit too upper crust for my family I'm afraid so it seems likely there is no connection after all, but it's been a very interesting trawl!
Thanks again