I'VE added a couple of trees to this page, in grey because I'm not sure how—or even if—they connect to our Ashbys. The first contains the only baptism of roughly the right date I could find for a Newton Ashby. Buckinghamshire is not London, though, and there's nothing yet to suggest that the earlier family moved to the city. The second greyed addition is for a Newton Ashby, carpenter, who married twice and worked north and south of the river. If he is "our" Newton Ashby, he should be a widower when he marries Jane. Instead, the parish entry gives his status as bachelor. I did find a burial entry for an Elizabeth Ashby in St Botolph's, Aldgate, 29th April 1791. The date would allow Newton to marry again in 1792, as the carpenter does. But with no age given for the deceased Elizabeth, plus the "bachelor" carpenter, it's too big a leap for now. I've put the three contemporary Newtons in green, so it's clearer what the tree would look like if they are indeed one and the same person.

Stephen ASHBY, buried 25 June 1763, Holy Trinity, Wolverton, Buckinghamshire
+Anne BURBRIDGE, married 30 September 1749 Holy Trinity, Wolverton.
│
├──William ASHBY, baptised 7 August 1750 Holy Trinity, Wolverton.
│
├──Ann ASHBY, baptised 27 January 1752 Holy Trinity, Wolverton.
│
├──Elizabeth ASHBY, baptised 28 November 1755 Holy Trinity, Wolverton.
│
├──Newton ASHBY baptised 3 August 1756 Holy Trinity, Wolverton.
│
├──Thomas ASHBY, baptised 19 September 1757 Holy Trinity, Wolverton.
│
├──Sarah ASHBY, baptised 7 July 1759 Holy Trinity, Wolverton.
│
└──Edward ASHBY, baptised 17 October 1761 Holy Trinity, Wolverton.



Newton ASHBY
+Elizabeth
│
└──Newton Robert ASHBY, born 21 Dec 1790, baptised St Marylebone; d.1867
Wandsworth District. Coachman, Labourer & Gardener
+Phoebe KILBY, born about 1792 Surrey; married 3 Oct 1820 St Mary Newington.
│Laundress.
├──Robert ASHBY, born 25 March 1821, baptised St Leonard's, Clapham.
│
├──Edward ASHBY, born 9 May 1823, baptised St Leonard's.
│
├──Thomas ASHBY, baptised 20 February 1825 St Mary's Lambeth.
│
├──Elizabeth ASHBY, baptised 12 November 1826 St Matthew's, Brixton, Surrey.
│
├──Daniel ASHBY, baptised 26 Oct 1828 St Matthew's Brixton; died 23 Dec 1901, Hendon Registration District. Labourer.
│+Mary SMITH, born about 1830, Surrey; married 27 Oct 1851 Holy Trinity, Clapham.
││
│├──Mary Ann ASHBY, born 9 Jun 1852, baptised Holy Trinity, Clapham.
││
│├──Newton Robert ASHBY, born 19 September 1853, baptised Holy Trinity, Clapham.
││+Sarah MEALING, born about 1852; married 28 December 1875 St John the Evangelist, Willesden.
││
│├──George ASHBY, born 14 September 1855, baptised Christ Church, Streatham.
││
│├──Jane ASHBY, born 9 January 1857 2 Orchard St, Clapham; died 28 April 1942 5 Mill Street, Armthorpe, Doncaster.
││Laundress.
││+1) James Thomas EALEY, born 8 Mar 1852 7 Kents Cottages, South Row, Kensal New Town; married 25 December
││1875 Willesden; died 1 Jan 1896 at 40 Walmer Road, Notting Dale. Carman.
││
││+2) Henry GARTON, born about 1855 Bristol; married 11 April 1898 Kilburn. Engine driver & navvy.
││
││+3) David WILLIAMS, born about 1853; married 9 October 1902 Our Lady's Church, Walthamstow. Labourer.
││
│├──Elizabeth ASHBY, born 24 October 1859, baptised All Saints, Clapham.
││
│├──Daniel ASHBY, born 19 January 1862, baptised All Saints, Clapham.
││
│└──Amy Anna Elizabeth ASHBY, baptised 7 September 1869 St Mary Magdalene, Paddington.
│+Charles Thomas WORKMAN, born c1867; married 27 May 1888 Christ Church, St Marylebone. *
│
├──George ASHBY, baptised 28 November 1830 St Matthew's Brixton. Groundworkman
│
├──Phoebe ASHBY, baptised 22 September 1833 Brixton.
│
├──Jane ASHBY, born 25 September 1835, baptised St Giles Camberwell.
│
└──Mary ASHBY, baptised 19 November 1837 St Matthew's Brixton. Dressmaker.



Newton ASHBY. Carpenter.
(Probably the N.A. of 20 Grub Street who acts as financial guarantor for John Cory, a patient at St Thomas's Hospital 3 April 1800.)

+1) Jane GREAVES, married 6 February 1792 St Bride's, Fleet Street; died c1798.
│
├──Elizabeth ASHBY, baptised c1795 Christ Church, Southwark.
│
└──Catherine ASHBY, baptised c1797 Christ Church, Southwark.

+2) Mary CANNON, married May 1799 St George without Cripplegate.
│
├──Elizabeth ASHBY, baptised 22 April 1804 St George in the East, Tower Hamlets.
│
├──William Newton ASHBY, baptised 23 November 1806 St George in the East, Tower Hamlets.
│
└──John Charles ASHBY, born 14 August 1809, baptised St George in the East, Tower Hamlets.



* Amy and Charles have a daughter, Amy Louisa, who in 1907 marries her cousin, George Ealey.