Didn't notice the query was back in 2008 before trying the 1861 census - ironically the Nurser Smith I found was born in Gateshead - maybe your rellie Both parents were born in Yorkshire. If it's of interest:-
RG9/3799 Gateshead Durham
Richard Smith Head Mar 29 Engine fitter born Leeds Yorks
Hannah Smith wife 27 born Bradford Yorks
Sarah Jane Smith dau 3 Nursur Smith son 1 Mary Louisa Smith 2 months all three children born Gateshead Durham
James H Joyce Unm Brother-in-law 20 Joiner born Leeds Yorks.
Glad that this query has re-awoken. Nurser Smith was my G Grandfather, born 1860 in Gateshead of Richard B.Leeds 1832 and Hannah Ne Joyce b.Bradford 1834.
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The following may be of interest, but still doesn't help with the source of nursur as a name.
A search on forename Nursur brings up the following births;
Nursur C Alexander 1915 Jul-Aug-Sep Durham, Tyne and Wear
Nursur Cuthbert T Jones 1895 Jan-Feb-Mar Durham, Tyne and Wear
Nursur J Wilson Apr May Jun 1918 Gateshead Durham
Charles Nursur Bell 18 abt 1895 All Saints Northumberland
Charlotte Nurser Bird 1883 Apr-May-Jun Derbyshire, Staffordshire,
Joseph Nurser Watson 1838 Oct-Nov-Dec Durham, Yorkshire - North
Nurser Ann Turner abt 1860 Pentrich, Derbyshire,
Charles Nusser Mold abt 1890 Neithrop, Oxfordshire, England
The following is something I noted down; "Idi Amin's former army chief of staff, Maj. Gen. Yusuf Gowon, and his bodyguard, Nursur Gille."