I think the Servt (crossed through), from the IoM, was Henry GAWN who appears to have come from Rushen.

The IGI has 3 Edward Waterson entries 1803-1805, with an Edward Nelson Waterson bapt 30 Oct 1804 Rushen - but you would need to look at all available UK records - all censuses, civil regt entries for children, his death & MI, etc., to see whether a middle name was ever used for him, because Henry Gawn's birthplace may not be significant.

It would also help to look up the 1851 census records for the other two Edwards, to exclude two of the three. If in the IoM they should give parish of birth.

Sue