Are the older Debretts and Burke’s online? Can’t seem to find much.
i have however done a family tree and can see where he may fit into the family but no descendants seem to be recorded.
The 14 th Knight ( who is approx 6 generations back for me ) and who took the oath of allegiance had at least 3 younger brothers but I cannot see if they had any descendants! One of these would fit in for my DNA connection.