5.11.1808 call on Gatty (sworn) / 22.12.1808 call on Gatty (not seen) / 30.10.1811 call on Gatty / 1.11.1811 call on Gatty, w. C(harles) C(lairmont) (indenture) / 16.2.1817 dine at L(eigh) Hunt's, adv. Gatty / 15.9.1830 dine at Ollier's, w. Gatty
The 1808 and 1811 entries probably referred to an attorney, likely either William Gatty of East-st Red Lion-sq or Robert Gatty of Angel-ct, Throgmorton-st, both of whom were also of the King's Remembrancer's Office, Inner Temple. Robert (will PCC 1838) appears from their wills to have been a brother of William (will PCC 1821). William had 8 sons and two daughters. What was being sworn to in 1808 I'm not sure.
The 1817 and 1830 entries are probably from a different family, and there may be some confusion in the DNB articles of Henry Gattie 1774-1844 actor "brought up to the trade of a wigmaker" and Charles Ollier 1788-1859 which states that as a good friend of Leigh Hunt DNB 1784-1859 Ollier became acquainted with "the four or five musical and theatrical brothers Gattie (including Henry and John Thomas Byng)". In 1814 Ollier married Maria Gattie 1786-1878. Her parents were John Gattie. hairdresser and wigmaker of 7 Woodstock-st, Oxford-rd and his wife Catherine (née Hodges) who were married as bachelor and spinster in 1782 at Marylebone. Among her brothers were John Thomas Byng Gattie 1786-1828 of the Treasury, Frederick Gattie 1788-1813, William Popham Gattie 1790-1873 clerk in the Bank of England, Henry Gattie 1794-1853, James Gattie 1797-1871 Poor Brother of Charterhouse 1861, and Edward Alexander Gattie 1799-1890 BA Cambridge 1849, teacher of languages 1851. So the actor Henry Gattie was probably not Ollier's brother-in-law, nor brought up a wigmaker. The Gatty at Ollier's in 1850 was likely one of his brothers-in-law, as also perhaps the Gatty at Hunt's in 1817, though Ollier wasn't present. And see my entry for Gattie.