Posting this census entry with two persons together named Lewis difficult to makeout surname not found any of them on 1851 census
Lewis Helbling Age 40 occ Merchant
Where born Foreign Parts
Civil parish Allhallows London Wall
Hundred London Within the Walls
County/Island Middlesex
Registration District London
Piece 719
Folio 41
Page number 30
Household Members
Lewis 15Fredk 12
Both born in this county
EDIT to add
There is a Frederick HEBLING born 1829 Hoxton, Middlesex on 1861 census

Piece 368
Folio 351
Page number 12
Added - Frederic Adolph Robison Helbling Birth 9 Feb 1829
Baptism 11 Jun 1829 Saint Leonards,Shoreditch,London
Father Lewis Peter Joseph Helbling Mother Jane
Will take another look to see if there’s another Lewis & Lewis together