Ancestry has this record with image. It must be David's widow, as the image indicates "of Honey Lane, Allhallows" and mentions "son David Dyas". Sorry, I'm not very good with reading Will images.
London, England, Wills and Probate, 1507-1858
Name: Joan Dyas
Probate Date: 5 Oct 1730
Parish: Allhallows
Could this be a record for son David?
London, England, Land Tax Records, 1692-1932
Name: David Dias
Residence Year: 1772
Residence Place: St Dunstan, City of London, England