Thank you Nell,
That confirms the brothers and sister John1711, Thomas1718 and Susannah1720 for me ( the only ones I have with dates).
According to the info from a cousin there were Sylvanus, Margaret, Bridget and Ann too (don't know where she got the info from) - Very odd that you found a Frances, Richard, Mary and Robert instead!! But as you say they would seem to fit in the same family.
Poor John and Elizabeth lost so many babies, how tragic.

Looks like Thomas might be the only survivor.
I will plod on and see if I can find more connections.
Best Wishes
Annmarie