The William B. Sides born about 1917-1918 Limestone County, AL that I mentioned is found on the 1920 Limestone County, AL Census in the household of his parents; Joseph W. Sides born Sept 1891 AL and Amanda (Mandy) Moore born 04 March 1886 AL, a daughter of Bill Moore.This William B. Sides did marry a Margaret Hill from Limestone County, AL.If I'm not mistaken, I believe someone told me that he died in CA.I actually have a picture of this couple.Joseph and Mandy Sides are buried in the Sandlin Cemetery, Cairo, Limestone County, AL, as are other Sides Family members, including my father.
The children of Joseph and Mandy Sides were; Ora Lee born about 1911 married Charles Goode, Floid born about 1914, Kathie C. born about 1916 married Robert Goode, William B. born about 1917-1818 married Margaret Hill, Houston born about 1927 and Cassie Sides.
Joseph W. Sides was a son of Willis Coleman Sides and Catherine Cordilla Warren, died about 1900 after census (Limstone County, AL) was taken. Several children were born to them.Joseph W. Sides was a half-brother to my father, Earl B. Sides born 1910 to a different mother, Tennie Alice Cook.Five children were born to Tennie and Willis C. Sides, after 1901.
Not sure if this is your family, as you say your William Sides was born 1886 in AL.Although, I find it somewhat of a coincidence if they both married a Margaret Hill.