Hi and Welcome to Rootschat from me too.

1900 USA census
Williamson, Thomas, age 60, b. Scotland, house carpenter, imm. yr. 1872
Williamson, Mary, age 62, b. Scotland, imm. yr. 1872
Williamson, Thomas, age 30. b. Scotland, butcher, imm. yr. 1872
Williamson, Wilhem, age 28, b. Scotland, butcher, imm. yr 1872
Williamson, Malcom, age 22, b. Michigan, post office clerk
You can see USA census' for free here,
http://www.mocavo.com/1790-1940-United-States-Census/126199Cheers,
DB