| EQUIVALENTS |
| ANCIENT GREEK: Athanasios, Athanasius |
| BULGARIAN: Atanas |
| GREEK: Athanasios |
| MACEDONIAN: Atanas, Atanasij |
| MEDIEVAL SLAVIC: Athanasi |
| RUSSIAN: Afanasiy, Afanasy |
| SERBIAN: Atanasije |
| DIMINUTIVES AND SHORT FORMS |
| ANCIENT GREEK: Athanas |
| BULGARIAN: Tase |
| GREEK: Thanasis, Thanos |
| MACEDONIAN: Tase |
| FEMININE FORMS |
| ANCIENT GREEK: Athanasia |
| GREEK: Athanasia |
| MACEDONIAN: Atanasija |
| SERBIAN: Atanasija |