This is the info I have so far on this William Alexander, don't see how the ages are so different that it can be the same man. Thanks.
WILLIAM ALEXANDER(RANDOLPH) was born Abt. 1817 in SC (Source: Tippah Co., Miss 1850 census), and died in probably Harrison co, Tx.(See this family in various census for this county).He married MILLY ? in probably Alabama.She was born Abt. 1830 in SC (Source: Tippah Co., Miss 1850 census).
Children of WILLIAM ALEXANDER and MILLY ? are: i. JEANNETTA3 ALEXANDER, b. 1849, Alabama (Source: Tippah Co. Miss 1850 census). ii. MARK ALEXANDER. iii. FRANKLIN ALEXANDER, m. LIDDIE. iv. DAVID ALEXANDER. v. MARTHA ALEXANDER, b. Abt. 1860. vi. WILLIAM ALEXANDER. vii. RANDEL ALEXANDER. viii. ROBERT LEE ALEXANDER, b. Abt. 1870.