re: From Burke's Landed Gentry 1847 under Williams of Herringston, Dorset. Jane Williams (no dates given) dau of Thomas Williams of Herringston (1728-57) married Adair Hawkins Esq of London (no further details given).
From "A Genealogical and Heraldic History of the Commoners of Great Britain and Ireland". by John Burke p.617, there is an entry which is about the same,
Thomas Williams esq. of Herrington b. in 1728 m. Jane Wilmot, dau of Sir Edward Wilmot, bart of Chaddesden, Derby, and dying in 1757 and left, with 2 daus, Sarah-Agnes, the wife of J. Letham, esq. and Jane, of Adair Hawkins, esq. of London.(It appears that Jane was m. by 1757 to Adair Hawkins ? )
From the marriage settlement of Rev Robert Hardy and Sophia Adair Howard (Robin Adair's reputed daughter) dated 14 Sept 1792. John Adair Hawkins of Great Marlborough Street, Saint James, Westminster, Esquire, a trustee. Still a trustee in 1815.
From "Memorials of John Flint South" p.49.
Mr. Chandler had two apprentices at this time.
The elder was John Adair Hawkins, the son of Adair Hawkins.
From "Wiltshire and Swindon Archives 78/40 (ii)
13 May 1785
Assignment of a legacy upon trust.
Ann Hawkins of Bath, widow to Sir Cesar Hawkins of Kelston, Somerset, and the Rev. Edward Hawkins of Bisley, Glos.
Rev. Thomas Howes / Hawes of Morningthorpe, Norfolk, England,
m.1758 Susan Linge and had dau Margaret Howes m. 1787
Edward Hawkins, ygst son of Sir Caesar Hawkins of Kelston.
From Eaton College Register 1753-1790, pub. 1921. p.258
(2nd son ?) m.1stly Miss Adair
m.2ndly 25 Sep 1788 Harriet Truesdale, d. at Brighton 1817.
mentions Col. Henry Hawkins
(3rd son ?) Edward Hawkins, rector of Kelston.
From "Gentleman's Magazine" 1842, p.328
Obituary. July 28 (1842)
At Murrell green, aged 85, (bc.1756/57)
John Adair Hawkins, esq. F.S.A.
of Great Marlborough-Street,
and of Lewell, co. Dorset.
From "Gentleman's Magazine" 1863, p.395.
Obituary. Jan 30 (1863)
In Great Marlborough-st., aged 95, (bc. 1767/68)
Mrs. Adair Hawkins, widow of John Adair Hawkins, esq.,
of Lewell, Dorsetshire.
John Adair Hawkins, Jun, Esq.
23 Great Marlborough Street.
If Adair Hawkins had son John Adair Hawkins bap. 1757,
(god-father being "Robin" Adair)
then John's mother may have been born c.1740 or prior ?
Seems unlikely that she would have been a sister
of "Robin" Adair bc.1710 ?Perhaps a step-sister or cousin ?