Thank you David Pinkney for adding the very clear photo of the church memorial for Andrew Innys alias Innes. Is this memorial in St. John's church or chapel in Bristol? The M.I. says that Andrew died on 29 Dec. 1723 in the 82nd year of his life, which gives his birth year as 1742.
His father William Innes has the letters A.M. after his name which was an earlier way of writing M.A. This suggests that he may have been a clergyman. However, info regarding his youngest daughter Martha, who married John Cossins of St. Paul's churchyard London, who retired to Bristol and built Redland Court, shows that members of the the Innys/Innes family had a stationers business in or around St. John's churchyard as well as in Bristol. If Andrew's father William was one of these (quite likely) Wiliam may have been buried in London, possibly at St. Faith's under St. Paul's.
In addition to using the peerage.com I have also used the subscription site Stirnet Genealogy. This also shows that this branch of the Innes family are descended from King James V of Scotland and one of his mistresses Margaret Erskine.
I also use Ancestry and Find My Past, but have only done a little so far vai Ancestry. Find baptisms for the Innys family has so far proved to be elusive.