Hi Dave
A belated welcome to Rootschat.
You haven't picked the easiest parish in England to research online! The LDS was refused permission by the local bishop to film many parish registers in Hunts, including Eynesbury, so there are no births or marriages online. Burials are available online at
http://www.familyhistoryonline.net/ but it's a pay per view site after a free index search.
Hunts Family History Society has transcribed a number of parish registers which are available for purchase on fiche, but unfortunately not Eynesbury. BUT their marriage index available on fiche does include Eynesbury:
working backwards from 1837
1835 Sarar marr William Martin
1834 Abraham m Mercy Eastell
1826 John m Elizabeth Picking
1818 William m Judith Otterway
1815 Edward widower m Elizabeth Easter widow
1813 Elizabeth m Thomas Jakes of St Neots Hunts
1805 William m Mary Brace widow
1797 Edward m Phyllis Mayes
1795 Abraham widower m Ann Nunn widow
1775 Abraham of Roxton Beds m Elizabeth Richardson of Kimbolton Hunts
And prior to 1754 there was only one Dilly marriage in the whole of Hunts.
You may get an idea from the marriages where George and William could have fitted in but it will take baptisms to confirm any suspicions, and that can only be obtained from Huntingdon Records Office, which does run an online research service, but it costs, although fees are reasonable.
Hope this gives you a start
Regards
David