There is a transcription/spetting error in the 1901 census. Krutzer instead of Kreutzer
The family is at 52 Cleopas Street in Toxeth Park Liverpool RG13/3430 page 41
Henry Arthur 29 Docks Labourer b Liverpool
Sarah 34 b IOM
William Henry 8 IOM
Annie Dora 4 IOM
Florence May 2 b Liverpool
Annie Dora sister 19 b. dressmaker Liverpool
John Taggart 16 stepson Shop boy b. IOM

1891 census
104 Upper Parliament St. Toxeth Park (orphanage)
Dorethea Kreutzer 9 Orphan School girl b. New Brighton Cheshire.
2 South Chester Street Toxeth Park
Henry 18 Bus conductor b Liverpool
Hugo 16 Light Porter Liverpool
Berthold 7 Scholar Liverpool
Charlotte Spafford widow 49 Housekeeper b Derbyshire

1881 26 Dickenson Street Liverpool
Hugo Kreutzer 43 Brokers clerk b Gemany
Anna 37 Germany
Gustav 12 b Liverpool
Henry 8 b. Liverpool
Hugo 6 b Liverpool
William 1 b Liverpool

1871 census 1 House 2 Ct. Kitchen Street Liverpool RG10/3777
Hugo Kreutzer 33 Omnibus Company Timekeeper. B. Saxony Germany
Anna 27 b Prussia
Gustav 2 b Liverpool
Berth 9 months b Liverpool

Hugo Kreutzer and Anna Popp are both on the same page of the marriage register Liverpool March 1866 quarter Vol 8b page 134.