This is the only Norah Iggo on the 1891 census
William Iggo 44 b Newcastle file cutter
Sarah A 40 b Sheffield Yorks
Tom T 18 b Sheff
NORAH 16 b Sheff
Wilfred 14 b Loxley Yorks
Theresa 12 b Sheff
Jessie 9 b Sheff
Alice 7 b Sheff
Ethel 5 b Sheff
All living at 7 Kelvin Street,Nether Hallam,Sheffield. Hope this is who you are looking for!