The INKSON Family in Norfolk : early 19th Century

There is at least one enigma in the early 19th century records of the Inksons in Norfolk. Can you help tie up any loose ends?

descendents
Mary Ann INKSON
b. ABT 1810 Kings Lynn, Norfolk
d.
con
con
con
John INKSON
b.
d.
con
con
Jane ????
b.
d.
con
con

John and Jane Inkson and daughter Mary Ann
This family appears in the records when Mary Ann is baptised in St Mararet's on May 30 1810. Neither Jane nor John appear before or after then and Mary Ann is not found later although that is confused by the other Marys born around this time or marrying into the Inkson family : she may have dropped the 'Ann'.