I would be glad to look them up for you in the 1901 Census. Do you have any idea when William was born?

I think I found the family that included his cousins, Harry, Syd, and Charlie:

1901 Census:
Miserden, Gloucestershire (very close to Bisley)
60. The Camp
John HUNT, Head, married, male, 51, General Labourer, born Miserden
Mary Ann HUNT, Wife, married, female, 42, born Bisley
Thomas HUNT, Son, single, male, 18, Plasterer's Apprentice, born Miserden
Charles HUNT, Son, single, male, 14, Groom (Domestic), born Miserden
Sydney HUNT, Son, single, male, 5, born Miserden
Gertrude, HUNT, Daughter, single, female, 3, born Miserden
Harry S. HUNT, Son, single, male, 1, born Miserden