Charlotte Williams, 92    THOMASTON - Charlotte Williams, 92, resident of Knox St. died, April 26, 2006 in Rockport.      She is the widow of Percy Williams.     Survivors: a son, Robert Williams, New Harbor, a daughter, Jean Hoyt, Thomaston. Family & friends are invited visit with the family 9:30-10:30 a.m. Saturday at Hall and Bibber Funeral Home, 78 Main St. Thomaston. Graveside service will be held 11 a.m., Saturday at the Village Cemetery, Thomaston. Memorials to: Knox County Humane Society, PO Box 1294, Rockland, Maine 04841. Arrangements by Hall and Bibber Funeral Home, Thomaston.