I am looking for two ancestors. Henry [Henricus] Jarvis and Mary Imber were both from Southampton, Hampshire. Henry's birthdate is about 1762-1765 following calculations from different sources. Mary's birthdate is about 1762-1766. Her parents firstnames are John [Joannes] and Mary [Maria]. In one source her familyname is Hember. They married 14 june 1790 in Saint Mary le Bone [Marylebone] London. Their son Henry was born in Canterbury. They moved to Ostend, Belgium in or before 1798.
Any information about these relatives or any hint towards sources would be appreciated.