It looks as if William's father may have been in the Army?
1891 census, reference RG12, Piece 659, Folio 48, Page 10
6 Rebecca Place, Gillingham
Bethel, W Head M 39 Labourer b East Indies
Bethel, Lavinia Wife F 33 b Gillingham
Bethel, William Son M 13 b Gibraltar
Bethel, Albert Son M 10 Scholar b Gibraltar
Bethel, Lavinia Daughter F 8 Scholar b Malta
Bethel, Alice Daughter F 6 Scholar b Malta
Bethel, Edith Daughter F 4 Scholar b Gillingham
Bethel, Ernest Son M 2 b Chatham
FindMyPast has the births of William Frederick, Albert H, Lavinia Maud and Alice Annie listed under Armed Forces Births.
Not easy to read the father's occupation and place of birth!
What do you think?