There's only one
Owen baptism at Fenstanton - Jane on 9 Sept 1832, daughter of John and Mary. She may have been William's sister, but that's pure speculation. More speculation is that it may have been a late baptism as the only Jane
Owen I can see in Fenstanton in 1841 was aged 20, living with Joseph and Ann
Mole (in 1851 William and Mary Ann had a daughter named Jane)
There are no
Owen burials in Fenstanton 1701-1900
There are the following marriages in Fenstanton
1821 John
Owen widower and Ann Stacy widow
1822 Ann
Owen widow and John
EdenA John
Eden 34 was buried on 21 Jul 1832 at Fenstanton
In 1833 Ann
Eden widow married Joseph
Mole widower
And finally I'm getting somewhere as Jane
Owen age 20 in 1841 was living with Joseph and Ann
Mole - so it seems as though Jane may have been the step? daughter of Ann. Also in the same household were Rebecca
Eaden 15 and John
Eaden 13. William
Owen 15 was the previous entry, living in the
Hall household.
There's a burial of John
Owen age 55 at Bluntisham cum Earith on 11 Jul 1822, but I can't tell if it was the same John. Bluntisham is 5 miles from Fenstanton.
The only Stacy/Ann marriage that fits was at Fenstanton in 1812 between William Stacy and Ann Briers, but I can't see a burial of a William Stacey in Fenstanton 1812-21
You need to look at the parish record microfilms to get further details of the above events, but from dates it fits that Ann (Briers?) was William's mother
The Fenstanton marriages and some baptisms have been extracted onto the IGI, so you can check the dates yourself. But the batch that includes Jane
Owen is one of the sexist female only batches, but I took my data from the BVRI which includes males as well!
David