1911 Census -- change of surname theatrical surname? Ethel is with Harry, but no sign of son.
ADDED: No change of name, just an Ancestry mis-transcription of the surname (Harrop).
Harry Harriet  (Harrop)
Age in 1911   34 c 1877
born   Harrogate, Yorkshire, England
Parish Sculcoates 6 Queens Road Hull
Married Occupation   Actor
Registration District Number   521 ED, institution, or vessel 29 Piece   28740