My 2nd great grandfather William George Gibbs married 3 times; the first 2 marriages were to Calder sisters; Annie and Agnes who are buried in Magnolia Cemetery Charleston SC where he too is buried. I am looking for the parents of the Calders though I descend from his 3rd wife Rosalie Rebecca McClelland who was married by Rev Donald McQueen in Sumter South Carolina. Wm Geo Gibbs was born 1825.