Jane Heffer married Joseph Davey and when he died married James Adams, a full age bachelor and labourer, an illegitimate son. Jane, his bride, was listed as daughter of John Heffer, a shepherd. John Kent and Emma Heffer witnessed the marriage. There is a record of a Jane Heifer baptised February 20, 1825 in Exning Suffolk to John Heifer and Mary.
The IGI shows possible siblings are:
C1) Ann Heffer, baptised August 16, 1818 to John and Mary, formerly Cambridge, England.
C2) John Heffer was baptised August 5, 1821 to John and Mary in Exning. Charles Heffer, baptised March 2, 1823 to John and Mary in Exning.
C4) Mary baptised October 8, 1831, to John and Mary in Exning.
C5) George Heffer baptised March 6, 1836 to John and Mary in Exning.
C6) David baptised September 16, 1838 to John and Mary in Exning
C7) Emma baptised August 23, 1829 to John Heifer and Mary in Exning.
Let me know if there is a connection, or feel free to embellish,
Thanks for the interest