| famname | Location | URL | Name |
| Conrad | USA,PA,PERRY COUNTY | www.epix.net/~wkennedy | Bill Kennedy |
| Coon | Worldwide Surname Research Newsletter | www.geocities.com/Heartland/4452/Ancestors.htm | Beverly Przybylski |
| Coover | Gemmingen, WUE > Pennsylvania, USA | www.homestead.com/coovercorner/genealogy_russ.html | Russell W. Coover |
| Copenhaver | Germany, Baden-Wurttemberg, Rublingen & Meckesheim | | Walter M. Bailey |
| Council | ENG to VA, USA | www.geocities.com/Heartland/Acres/7241/index.html | Belinda Melton Hughes |
| Cover | Gemmingen, WUE > Pennsylvania, USA | www.homestead.com/coovercorner/genealogy_russ.html | Russell W. Coover |
| Cowdrey | USA | www.geocities.com/Heartland/Pointe/3548 | Rhio R. Gillis |
| Coyle | USA | www.familytreemaker.com/users/g/a/r/Leona--Garcia-WA/ | Leona Kollman Garcia |
| Crabtree | USA | www.geocities.com/~osburn/crabtree.html | Sherry Osburn |
| Craigmyle | USA, Scotland | members.aol.com/Rdkfour/craigmyle.html | Robert Kleopfer |
| Cramer | DEU>OGLE CO., IL | members.aol.com/rogercubs/index.html | Roger Cramer |
| Cremeans | Ireland > MD/VA/WV USA | www.geocities.com/Heartland/Ranch/1322 | Gracie Stover |
| Croan | USA | homepages.rootsweb.com/~damonf | Damon Floyd |
| Cutsinger | Germany>PA>VA, KY, IN, OH, IL, MO | www.familytreemaker.com/users/a/l/e/Melissa-T-Alexander/ | Melissa Thompson Alexander |
| Dabach | Graffenhausen,Germany>US>PA>MD | | Peggy DeBaugh Jeffra |