Thanks to all posters and your contributions and suggestions. I will try OXFHS they are always very helpful.
Christian Juffs is the wife of Thomas Lay who died in 1820. He left a will and mentions a Thomas Jiffs/Jeffs/Juffs in the will has having land in Freeland.
I did find some other Juffs:
On Ancestry there is a Thomas Juffs bap 21 Oct 1750 Eynsham, parents Thomas and Elizabeth.
On Family search there is a Mary Juff bap 21 Dec 1755 Culham and John Juff bap 20 Dec 1753 Culham, parents listed as Thomas, no wife mentioned.
On Family search Martha Juff bap 19 Jan 1751 Culham, parents Thomas and Maria.
Also found on ancestry
Thomas Juffs married Mary Moody 1784 ,Ox
Thomas Dipper married Catherine Juffs 1786 Ox (father is Thomas Jeffs , hisWill dated 1805,Eynsham, mentions Catherine Dipper as sole heir)
George Juffs married Ann Bates, Edgcott
So lots to search and thank you.
JJJ2