Hello Pauline, you have had me frantically searching,
here is what I have so far,

William GARRET married, Joney CHRISTIAN 7th February 1770 Andreas
William Garret of Lezayre and Joney Christian of this Parish (as sighted on Andreas Parish Register)

now I have added, as just realised Joney Christian of Andreas,

Baptism from IGI,
Joney Christian 15 May 1748 ANDREAS
Father, Gilbert Christian

Will for, Gilbert Christian 1787 Andreas film number, 0106400

this should name, Joney Garret als Christian

and now I will go and frantically search the William Garret side, (I can hear your laughter from here)

Averil