Complex sentence: He is a direct descendant of the Weavers of Weaverville, North Carolina, through his maternal grandfather Joseph Barnett Weaver, who came to live near Evergreen, Alabama to find a warmer climate because he suffered from asthma--a condition Waters inherited.
Split into simpler sentences: He is a direct descendant of the Weavers of Weaverville, North Carolina, through his maternal grandfather Joseph Barnett Weaver. The latter came to live near Evergreen, Alabama to find a warmer climate because he suffered from asthma--a condition Waters inherited.