Boyle's Court Guide (1795) represented the inhabitants of Grosvenor Square in 1795, whose names may be of interest. However, it is worth remembering that about ten years after this list was compiled, all the houses - with the exception of those on the east side - were renumbered, and therefore only those from No. 1 to No. 8, are identical with the old numbering :
Of these, Lady Thanet, wife of the seventh Earl, was daughter and co-heiress of the second Marquis of Halifax, and therefore sister of the third Marquis, who was also stated as residing in the Square at this time, and whom Cumberland describes as graceful in his person, and William Pitt called "a pretty man".
The Lady Blandford mentioned above was wife of the Marquis who subsequently became third Duke of Marlborough, while the Duchess of Somerset was probably the wife of the eighth Duke, as the word "Dowager" is omitted.
Lord Maynard was the sixth Baron, and Lord de la Warr the sixteenth Baron, who was created an Earl in 1761, and whom Lord Hervey describes as "long, lank, and awkward."
To help identify the old and new numbering, it is woth adding that Horwood, in his plan of 1792, gives Lord Leicester's house as being the corner one at the west end of the north side of the Square, which later became No. 21.