C
| Caddie | Catootje | Chicago | Cloudy |
| Caelin | Catrina | Chi-chi | Clouseau |
| Caesar | Catzilla | Chicky | Clovis |
| Cagney | Caya | Chico | Clydester |
| Cairo | Cayou | Chief | Co |
| Caitlin | Ceasar | Chili | Coach |
| Cajun | Cecil | Chillie | Coal |
| Calico | Cedric | China | Cobby |
| Calie | Celest | Chinny | Cobie |
| Calimero | Celeste | Chip | Coco |
| Calin | Cessie | Chippie | Cocoa |
| Callaway | Chablis | Chispa | Cody |
| Calvin | Chamar | Chistie | Cognac |
| Calypso | Champagne | Chita | Coke |
| Cambel | Chan | Chitchat | Colette |
| Cameo | Chance | Chiva | Coltrane |
| Cameron | Chandon | Chivas | Columbus |
| Camille | Chanel | Chloé | Comet |
| Cammie | Chani | Chocolate | Compucat |
| Candidus | Chanou | Chocolet | Conan |
| Candis | Chantelle | Chocotof | Confetti |
| Candy | Chaos | Chopin | Confucius |
| Cannabis | Chaplin | Chopsticks | Conrad |
| Capone | Chaps | Choupette | Coors |
| Cappuccino | Char | Chow Chow | Copernicus |
| Capri | Charan | Chrissie | Copper |
| Caprice | Charise | Christie | Cora |
| Captain | Charity | Chubbs | Cordelia |
| Cara | Charles | Chuck | Corinna |
| Caramel | Charleston | Chuckles | Cornelis |
| Carbon | Charlie | Chucky | Corsa |
| Carfield | Charlotte | Chump | Cosha |
| Carien | Charm | Chuppa | Cosmic |
| Carino | Charmar | Churchill | Cosmo |
| Carkamel | Charmian | Chutney | Cosmos |
| Carla | Charmin | Cinderella | Count |
| Carlo | Chase | Cindy | Cousteau |
| Carlton | Chaser | Cinnamon | Crace |
| Carly | Chat | Cira | Cracker |
| Carmel | Chatty | Cisco | Creampuff |
| Carmen | Chaz | Ciske | Creeper |
| Carolien | Checkers | Cita | Crescendo |
| Caroline | Checkmate | Claire | Cricket |
| Carolus | Cheeko | Clanck | Crispy |
| Carrots | Cheela | Clara | Crockett |
| Carson | Cheesy | Clarence | Cruiser |
| Cartousch | Cheeta | Clarissa | Crummy |
| Casanova | Cheetah | Clark | Crunch |
| Cashmir | Chello | Classy | Crunchy |
| Casimir | Chelsea | Claude | Crystal |
| Caspar | Chenka | Claudia | Cuddles |
| Casper | Cheri | Claymore | Cujo |
| Cassandra | Cherokee | Clementine | Cupid |
| Catalina | Chessie | Cleo | Curfew |
| Catastrophe | Chester | Cleome | Curl |
| Catharina | Chevoux | Cleopatra | Curry |
| Cather | Chevy | Clide | Cutie |
| Catherine | Chewey | Cliff | Cyclops |
| Catillac | Chewie | Clifford | Cynthia |
| Catkin | Chewy | Clio | Cyper |
| Catlin | Chiba | Clive | Cyrano |
| Cato | Chica | Cloey | Cyrus |