William Henry was Carter T. and Mary’s oldest son and was probably named after his Grandfather. He was born in Tennessee in 1818, Wayne County is right on the Kentucky-Tennessee boarder so he easily could have been born across the boarder in Tennessee.
His parents moved from Wayne County, Kentucky to Missouri in the late 1830’s. They first moved to Pulaski County, Missouri because the family turns up there in 1840. They then must have moved to Polk County for a couple of years because William married Nancy J. Wilson there in 1844. Then a year later their first son James Madison was born also in Polk County. Sometime between 1844 and 1850 the entire family moved to Indian territory just north of Missouri which would eventually become Harrison and Mercer Counties.
In 1850 the family is living in Harrison County, Missouri listed under the name Robinson
Then in June 1854, William Henry Robertson & Nancy Robertson started selling their property in Harrison County to his brother Joseph Robertson also of Harrison County. “Harrison County Missouri Courthouse Deed Book Q, page 678 7 April 1864 William Henry Robeson & Eliza Robeson, his wife to Joseph Robeson Section 36, Twp 66, Range 26 15 acres or less.” Then in 1856 they sold some more property to Joseph “Nevada Corner Section 36, Range 26, Twp. 66.” So right before the Civil Way the family moved to Barry County, one of the most southern counties of Missouri on the Arkansas boarder.
I think northern Missouri had Union leanings and southern Missouri had Confederate so the Robertson family maintained their Union sympathies.
Per the family history, William fought in War along with his two oldest sons. They all would have joined the Union army in the last months of the war. (see the section under James Madison Robertson). Nancy, his first wife died during the war and upon his return he remarried Eliza Sullivan. However, Nancy died in 1863 three years before the war was over and William’s two sons didn’t join the army until 3 months before the war ended.
He must have always had strong feelings for Nancy because when he died 10 years later in 1873 he was buried in the Browning-Robertson Cemetery at Golden, Missouri next to Nancy.