Montagu, Basil
The DNB entry for Basil Montagu is in error about the date Montagu married his 2nd wife, Laura Rush, which was at Glasgow on 6.9.1801. His 3rd wife was clearly the one in entries after 1806, she was famous as Thomas and Jane Carlyle's 'noble lady'.
Although Montagu first appeared in Godwin's 1796 list for 1795, the entry for 6.12.1794 was only a 'see' so may have been him.
The B M on f 46r of Vol VII of Godwin's diary before the 1796 list is surely him, see Montague, Sidney
Amendments to Oxford DNB