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