Query: Possible Harrison-Ward Connection

The following query is submitted on behalf of Max Harrison Williams (deloutre@yahoo.com).
My earliest identified Harrison ancestor is Joseph Harrison, who died testate in Jones County, Georgia in 1828. His wife was named Charlotte. Her surname remains unknown. Most of their 10 children were born in North Carolina before they moved farther south. We know nothing else about their earlier lives. The earliest record of Joseph and Charlotte in GA is the census of 1820. There is a reference in the Onslow records about a Joseph Harrison becoming the guardian of a Charlotte Ward in 1797. The records do not state the circumstances. Could Charlotte Ward have married Joseph Harrison, her guardian? Would appreciate hearing from anybody who might have further info. Thanks very much.