I do not have access to 1901 Census and have not seen the one with children Charles, Nellie, Mary and Annie that you mention.
Hi again Haff,
Ellen was aged 1 in 1891, so most likely the same child.
Birth, Dec qtr 1889
Ellen Hughes
Rotherham, Vol 9c, page 625
~~~~~~~~~~
1901 census :
RG13/4392, Folio 19, Page 30
Yorkshire, Rotherham
19 Court 45, Wellgate
Charles Hughes, h. mar, 40, Wheel Smith
Harriet, wife, mar, 37, b. Pitsmoor
Charles, son, 16, Hopper Filler Steel Works
Nellie, dau, 11
Mary, dau, 9
Annie, dau, 5
All born in Rotherham, with the exception of Harriet.
Pels.