HCR diary 5.11.1824 "Mrs Aders, Ellen, Miss Denman and the Miss Gunns called on me - Not a little worried by such a visit I accompanied them to the Royal Academy Somerset House"
8.11.1824 party at Aders "The Flaxmans with the Miss Gunns and old Stothard"
20.5.1828 "The Rev Mr Gunn and his son breakfasted with me"
HCR diary 10.11.1817 "I stayed with Aders till late and gave him directions to buy a number of engravings for Mr Gurney"
Probably? Hudson Gurney (DNB 1775-1864)
HCR diary 8.6.1828 "called on Aders - a Mr Goldschmidt was with him, who took us to see some fine paintings on sale in Leicester Square, belonging to Signor Reghellini di Schio"
4.11.1833 "went to the Aders - an agreeable evening there - Mr Goldschmidt was there - He has proved a very generous friend"
Possibly Adolphus Goldschmidt?
HCR diary 13.1.1819 Mrs Opie / Fuseli / Sidney Smith / Samuel Rogers (I just made that note with no more context)
4.4.1823 after seeing Aders' pictures, Sir George Beaumont "proposed bringing Fuseli"
George Beaumont (DNB 1753-1827) and Henry Fuseli (DNB 1741-1825). I've no idea whether Fuseli did visit Aders' collection
HCR diary 1.7.1842 at Samuel Rogers' breakfast table "Mrs Forster daughter of Banks the sculptor"...."and her daughter Mrs Poinder"
Edward Forster (DNB 1769-1828) writer married at St George Hanover Sq on 3.8.1799 Lavinia Banks. Emma bapt 20.5.1801 St George Hanover Sq dau of Edward & Lavinia Forster, married at British Embassy Paris 26.12.1832 Ambrose Poynter (DNB 1796-1886) architect. She died 1848, Lavinia nee Banks may have married again? (Lavinia Forster marriage index 1837 Kingsclere Hants).
HCR diary 10.4.1844 Robinson called "on Mrs Gent (a miniature painter) a friend of Mrs Aders for whom a letter was brought by Stansfeld from Mrs A: and by me strangely forgotten. I lately found it, thinking it had been put in the post - I called on her today and delivered it with an apology. She seems an agreeable person (6 Tavistock Street, Bedford Square)"
HCR diary 5,4,1823 musical party and supper at Aders' "This party I had made for them. Wordsworth, Monkhouse and the ladies, the Flaxmans, Rogers, Coleridge, Mr & Mrs Gillman were my friends. Besides the Reeces and other musical party"
16.6.1826 "Mrs Mont: and Mrs Aders met at Gillman's - they shook hands. Ich dachte dass Mad Aders sich herabliess - sie wäre gewiss froh wenn Mrs M: sie besuchen wollte"
HCR diary 17.5.1841 "Ellen seems to be recovering herself - she is under the protection of Mrs Fry!"
This was very likely Elizabeth Fry (DNB 1780-1845). Mrs Aders' daughter Ellen Ley (1804-1867) had previously been arrested for theft (see HCR diary 7.1.1840)
HCR diary 22.2.1821 Robinson sat for his portrait to Jacob Strutt, mentioned Mrs Strutt's brother Frost of Hull
Charles Frost (DNB 1782-1862)
HCR diary 23.2.1825 "at Flaxman's I heard of the death of Mrs Franklin"
Eleanor Anne Porden (DNB 1795-1825)