In the 1911 census, Harry is a bricklayer and his wife is Eva Thompson.
They married in Middlesbrough, 1909.
for info. so you might rule him out there's this
Henry Nicholson right age 16 (1885) pob Middlesbrough, he's living in Northumberland in 1901
1901c RG13; Piece: 4778; Folio: 17; Page: 25 - Northumberland
Richard Nicholson 59 Driffield, Yorkshire
occ bricklayerAnn 53 Crook, Durham
HENRY son 16 Middlesbro
occ apprentice bricklayerCharles son 14 Gateshead, Durham occ app joiner
As mentioned previously his marriage certificate would confirm his father's name and occupation
ADDED - for info.
I think this is the Marriage Durham 1872
Richard
NICHOLSON female name on same page
Ann
GARRbut I'm not seeing a Henry/Harry Nicholson 1884 Middlebro' birth mmn Garr on GRO
but there is one with
mmn CHISEM and there is one for a
George Nicholson 1872 Durham mmn CHIS... and
Fred Nicholson 1874 Durham mmn CHISMAN and
Richard William Nicholson 1878 Hunslet mmn CHISEM
perhaps Ann was married previously
edit - added(there's this entry 1870 Auckland CHISEM/GARR and death 1871 Auckland Burnip GARR age 28)
1891 RG12; Piece: 4203; Folio: 15; Page: 25 - Northumberland
Richard Nicholson 46
occ BricklayerAnn 40
George 19 Durham bricklayer
Fred 17 ‘’
William 14 Yorkshire Leeds coal miner
HENRY 7 “ Middlesbro
Charles 4 Durham
1881 RG11; Piece: 4897; Folio: 112; Page: 28
Richard Nicholson 38, Ann 32, George 9, Fred 7, Richard W 2
Please come back and let us know what the m/c says