Thorney Island was noted as a place of some importance from a very early date. The only ford for a considerable distance gave passage over the Thames to the road leading from Chester to London. Here a Roman fort was positioned. It was stones from this Roman fort that were used to begin the foundations of Westminster. It is recorded that a Saxon monastic church, dating from 750 AD occupied some of the present site. It was not until 1065 AD that the Norman church, which had been some ten years in the making, was consecrated.
It is in the Calendar of Close Rolls that the first JONES is identified. [Reign of Edward I (1272-1307) to Edward IV (1461-1470) p.212.] A Richard Jones along with a John Tererd is given as witness dated 10 March 5 Richard II. John Tererd is identified as "the elder of Esstances". It is dated July 29, 1382, Westminster.
Interestingly, it was during the year 1386 that the downfall of Richard II began. [See: British Kings & Queens, by Mike Ashley, pp.606-607.]
A helpful reference is: The New Guide to Westminster Abbey, by H.F. Westlake, 1916.