| Singular Nominative | ceanncheathrú |
| Singular Genitive | ceanncheathrún |
| Plural Nominative | ceanncheathrúna |
| Plural Genitive | ceanncheathrúna |
| Singular Nominative | an cheanncheathrú |
| Singular Genitive | na ceanncheathrún |
| Plural Nominative | na ceanncheathrúna |
| Plural Genitive | na gceanncheathrúna |