« Reply #12 on: Sunday 29 September 13 16:14 BST (UK) »
FindMyPast have the Canterbury area parish registers including St Margaret at Cliffe. From a quick look I can only see one other child to George's parents but it's not a John. However, the register for 1787-1791 is a bit feint unfortunately so there could have been other children to them. There are quite a lot of Hobdays in Kent anyway so worth you taking a look at Findmypast.
(KENT) Lingwell, Rayment (BUCKS) Read, Hutchins (SRY) Costin, Westbrook (DOR) Gibbs, Goreing (DUR) Green (ESX) Rudland, Malden, Rouse, Boosey (FIFE) Foulis, Russell (NFK) Johnson, Farthing, Purdy, Barsham (GLOS) Collett, Morris, Freebury, May, Kirkman (HERTS) Winchester, Linford (NORTHANTS) Bird, Brimley, Chater, Wilford, Read, Chapman, Jeys, Marston, Lumley (WILTS) Arden, Whatley, Batson, Gleed, Greenhill (SOM) Coombs, Watkins (RUT) Stafford (BERKS) Sansom, Angel, Young, Stratton, Weeks, Day