What is the evidence that John Fortescue was born in 1720 in Ireland?
- The first source has him marrying in England in 1740
What is the evidence that he is the son of Thomas Fortescue, MP, of Ranaldstown and Elizabeth Hamilton
- They married in November 1721 - 21 months after he was born
- William Henry Fortescue, 1st Earl of Clermont born 1722 is listed as their eldest son in https://en.wikipedia.org/wiki/William_Fortescue,_1st_Earl_of_Clermont