I believe that this is may be a corruption of Granville Clifford Gerald's name. This entry is carried only for matching purposes with other trees, since so many records use the name Olanville.
However, there is a tombstone for a Trezerant Gerald in MIssissippi, with a death date of July 1858, and a birth year of 1818..
The possibility exists that Granville and Olanville were twins, since they both are recorded as being born the same year.
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