My 2nd great grandmother on my mom's side is Julia Deleslie Dubose (1852-1924). Going back from her (with less and less evidence) is:
Ezekiel Dossey Dubose (1825-1900)
John Dubose (1796-1860)
Andrew Dubose (1751-1806)
Andrew Dubose (1699-1787)
Isaac Dubose (1665-1714)
Louis Boint Dubosc (1630-1668)