Hi - Are you still looking? There are about half a dozen people named William B Strange in the 1940 US census, so there is no way of telling which man would be yours (you don't give a date-of-birth or location info or wife's name, etc). In addition your grandfather could appear in the census as a Bill or Billie or without a middle initial, etc. - or maybe he died before 1940 - or he didn't live in the USA. In other words there are more candidates to be your grandfather than just the half dozen William B. Stranges I mentioned. So if you're still interested let us know more about your ancestor. I'm a volunteer researcher, and there are many more like me, delighted to help in your search, if we can. Your post is parked in an out-of-the-way spot on Ancestry message boards, and I suspect that is why you had no response.
I'm curious where this surname comes from in various families, and that is why I stopped in this forum on "Name Origins." In my own research in Denmark I've run across this name more than once (no one related to me, but nonetheless I was curious).
Here's an example of a William B. Strange who had a son William B Strange, information is as found on Find-a-Grave and not researched by me:
William Bryce "Bill" Strange
Birth: Oct. 29, 1828 in Spartanburg, Spartanburg County, South Carolina, USA
Death: Jun. 12, 1899, Gilmer, Upshur County, Texas, USA and buried in Pleasant Grove Cemetery in Lafayette, Upshur, Texas. Son of Littleberry Strange b. 2 July 1807, near Spartenburg, South Carolina and Elizabeth Brice, b. Abt. 1804, SC. Husband to 3 wives: 1. Isabella Parks and 2. Rebecca McClung and 3. Sarah Williams. Father to: David C, John Berry, Burl, William Brice, James Harvey and Thomas Edward Strange. ---- SON William Bryce Strange born Feb. 2, 1863, died Jun. 6, 1944. His mother was Isabella Parks. His wife was Ida Catherine Nix (1870-1929). This William is also buried in Pleasant Grove Cemetery in Lafayette, Upshur, TX.
Here is the above William B Strange in the 1880 US Census:
1880 in Precinct 6, Upshur county, Texas
William Strange 52 born 1828 in South Carolina
Rebecca Strange 42 b GA
William B. Strange 16 born about 1864 in Georgia
James H. Strange 10 b GA
Thomas E. Strange 4 b TX
All best wishes.