You will have some of this, but as I typed it up, will post ....
Family of William PFEFFER (vellum binder) and wife Ann Mary Elizabeth SHEPHARD (married 1811)
Baptisms -
William John George PFEFFER b. 7 Feb 1813. St Dunstan (Vellum binder, Mile End Old Town)
Edmund Charles PFEFFER 1815 Saint Giles Cripplegate (Vellum binder, London Wall)
Henry PFEFFER 1817 Saint Luke, Finsbury (book binder, White Cross Street)
Walter Pierson PFEFFER 1818 Saint Giles Cripplegate (vellum binder, White Cross Street)
Richard Augustus PFEFFER 1822 Saint Giles Cripplegate (Vellum binder, Jewin St)
Maria Sarah PFEFFER 1823 Saint Giles Cripplegate (Vellum binder, London Wall)
Emma Ann PFEFFER 1826 Saint Luke, Finsbury (Book binder, Philip Lane)
Mary Ann PFEFFER 1828 Saint Giles Cripplegate (Vellum binder, Grub St)
BURIAL 8 Feb 1828 Bunhill Row, London
William Pfeffer (46 yrs) Little Moorfields
A couple of notes of interest regarding children - Walter Pierson PFEFFER (1818) was enrolled in the Greenwich hospital School
https://discovery.nationalarchives.gov.uk/details/r/C14601759This implies that his father had served in the Navy at some stage (probably during Napoleonic wars)
Henry Pfeffer / Pleffer (1817) at age 14 in 1831 he was convicted of stealing and sentenced to 7 yrs transportation
https://www.dhi.ac.uk/san/ob/1830s/183110200080.gifhttps://discovery.nationalarchives.gov.uk/details/r/C12326031Transported on ship Waterloo to NSW in 1833 . Certificate of Freedom in 1839
I can see that he married in 1850 in Bathurst, NSW
and there is a death for Henry in NSW in 1898
https://trove.nla.gov.au/newspaper/article/238374248?searchTerm=%22Henry%20Pleffer%22ADDED -Ann Mary Elizabeth Pfeffer (nee Shepard) born abt 1789 in Stepney (according to census)
DEATHPFEFFER, ANN MARY ELIZABETH Age 83
GRO Reference: 1872 M Quarter in SHOREDITCH Volume 01C Page 85