| Cassia | - | Ukrainian Name | Cassiana | - | Latin Name |
| Cassianna | - | Latin Name | Cassidee | - | Irish Name |
| Cassidi | - | Irish Name | Cassidie | - | Irish Name |
| Cassidy | - | Irish Name | Cassie | - | English Name |
| Cassiel | - | Latin Name | Cassielle | - | Latin Name |
| Cassiopeia | - | Greek Name | Cassy | - | Maori Name |
| Catalena | - | Spanish Name | Catalia | - | Spanish Name |
| Catalin | - | Basque Name | Catalina | - | Spanish Name |
| Catalyna | - | Spanish Name | Catarina | - | Italian Name |
| Catava | - | African Name | Cate | - | Anglo Name |
| Catelyn | - | Irish Name | Caterina | - | Chinese Name |
| Cathalina | - | Swedish Name | Catharina | - | Greek Name |
| Catharine | - | Greek Name | Cathasach | - | Gaelic Name |
| Catherine | - | Biblical Name | Catheryn | - | Anglo Name |
| Cathleen | - | American Name | Cathrine | - | English Name |
| Cathryn | - | Anglo Name | Cathy | - | American Name |
| Catia | - | Finnish Name | Catie | - | Australian Name |
| Catori | - | American Name |
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