The Belfast Newsletter Index Oct 11 1765 #68940 has an entry -
Marquis of Kildare, uncle, Caesar Hawkins, serjeant surgeon.
Lord Kildare was known as Lord Adare in a Dublin Directory.
Therefore, Marquis / Marquess of Kildare may have been brother to Miss Adair who m. Sir Caesar Hawkins, Sergeant-Surgeon to the King.Perhaps "Robin" Adair may have been related to this Marquis of Kildare (Lord Adare ?)as Robin Adair was a surgeon to the King.
Also in the Belfast Newsletter Index June 30 1778 #137896, His Majesty confered the dignity of Baronet on Sir Caesar Hawkins (at the same time as Sir Richard Jebb, colleague of Robin Adair, whom, it is said, refused a knighthood). There are a number of entries for Caesar Hawkins, surgeon, and Pennel Hawkins who innoculated Prince Edward.
Perhaps Robin Adair may have refused a knighthood as it may have been a lower ranking to that which his family already had.However, all this is pure conjecture on my part, interesting though.Would Max Brand have known in writing a book "The Secret of Dr. Kildare" ?
The household of Frederick, Prince of Wales 1729-1751 lists - 1744 Caesar Hawkins, (warrant salary 12 Jan 1744). (Add. MS 24397 f. 108 v.) 1748 (Chamberlayne, 1748, pt. iii, 275)
By 1748Pennel Hawkins, 1748 (Chamberlayne, 1748, pt. iii, 275
Is there a lineage for the Earl of Kildare, perhaps showing a marriage to a Mr. Hawkins and to a Miss Keppel ?