He may have been born in 1420 in Raby With Keverstone, Durham, England, United Kingdom and died in Glassenbury, Kent, England and was married to a woman called Alice of unknown date of birth and unknown surname. They had a child Richard Stephen Naylor born in 1436 in Glassenbury, Kent, and died 22 Aug 1483 in the same part of Kent, England. Richard married Elizabeth Neville 1444-1500
Have a look at Richard Stephen Naylor on the following link www.geni.com/people/Richard-Naylor/6000000006444295473 (good detail there) for decendent details.
Records are more difficult to track. Have you looked at www.englandsimmigrants.com they are researching the extensive archival evidence about the names, origins, occupations and households of a significant number of foreigners who chose to make their lives and livelihoods in England in the era of the Hundred Years war, the Black Death and the Wars of the Roses.
This site is mentioned because it will give you some background to this period
Another useful site is www.londonfhc.org to browse Film Catelogue for England Kent