#1 Santos, William Douglas Resinente dos, author of A receita de Jesus para uma vida mais feliz; also writes as William Douglas (LC 97044240)
#2 Douglas, William, 1949- author of Television families (LC 2002109805)
#3 Douglas, William, 1708-1798, author of The Douglas register (LC 88027701)
#4 Douglass, William, approximately 1700-1752, author of A dissertation concerning inoculation of the smallpox; sometimes spelled William Douglas (LC 8801172)
#5 Douglas, William, author of Animals of the world.
#6 Douglas, William J., author of Environmental GIS : applications to industrial facilities (LC 79133411)
#7 Douglas, William, author of On eagle's wings.
#8 Douglas, William, 1878-1963, author of The house of Shea (LC 2013025471)
#9 Douglas, William, author of The one parent family; possibly the same as #2.
#10 Douglas, William, Private, 10th Royal Hussars, author of Duelling days in the army.