There might be a way back...
John Heathfield married Olive Hiens(!) in Salehurst, 3 April 1766
He signed, he could be the man witnessing all those marriages there later.
Olive marked (perhaps not surprising)
Three baptisms to John + Olive are indexed on FamilySearch
Edward Heathfield 1767
John Heathfield, 1769
Wiliam Heathfield, 1771
They say they were baptized at Rye, but I had a look and couldn't find them there.
Edward was actually baptized at Salehurst in October 1767 (from BT)
But so far I haven't found any baptisms for the period among the Salehurst parish registers on Family Search. And the BT's are in a state! So, admittedly from a quickish look, I can't verify that the other two were at Salehurst and see if they also had a daughter.
Burials at Salehurst include
William Heathfield, 10 July 1819, age 48
Edward Heathfield, 8 April 1836, age 68
Just right!
And that could be the William Heathfield who married Mary French in 1796 (witnessed by his brother in law?, and John Heathfield) and had the daughter Alfra.
There is this marriage at Etchingham, close to Salehurst
22 April 1727
Edward Heathfield +
Afra Benden
PR is here if logged in
https://familysearch.org/ark:/61903/3:1:S3HY-DRZH-7NR?i=140&cat=215354Did Edward and Afra have a son John? That would be good!
And is Afra the source of your Alfra name?
John
EDIT - Edward and Afra may have been in Ashburnham, there is an Edward Heathfield buried there in 1766, and Alfra in 1782.