My ancestor (I hope!!) was Elizabeth/betty Justrell Corke.
She appears to be the only child of John Corke and Elizabeth Justril.
This is their marriage on 21 September 1732:
https://www.ancestry.co.uk/interacti...0144/901926312
and this is her baptism on 6 July 1733:
https://www.ancestry.co.uk/interacti...51-00095/32942
But is it Justrell or Instrell? I and J are identical in this period.
I think (judging by hits on freebmd) it is Instrell, but would welcome your comments.