I know this is a terribly later reply to this post but I am doing research about my own Jarvis's in Southwold, Suffolk. Apparently Hannah is my 3rd GGMother who was married to Willam Jarvis, b abt 1780 (unknown birth place) and d. Jul 1841 in Mutford, Suffolk, United Kingdom.
Children:
Hannah Jr
Birth 2 Dec 1799 in Lowestoft,
Death 15 Jan 1879 in New Norfolk, , Tasmania, Australia
William Jarvis Jr
Birth 18 April 1801 in England
Death 26 Apr 1870 in Macquarie Plains, Tasmania, Australia
Elizabeth Jarvis
Birth 14 Feb 1803
Death unknown
Robert S Jarvis
Birth 28 Nov 1805 in Trowse, Norfolk, England
Death 11 Sep 1876
James Jarvis
Birth 27 Sep 1807
Death unknown
Mary Ann Jarvis
Birth 23 Jun 1809
Death unknown
Henry Jarvis
Birth abt 1815 in Lowestoft, Suffolk, England
Death
That should be a good start and hope it helps.