Inherited from Proto-Slavic *(j)azъ, from Proto-Indo-European *éǵh₂. Cognate with Lithuanian aš, Sanskrit अहम् (aham), Ancient Greek ἐγώ (egṓ).
азъ • (azŭ)
| Singular | 1st person | 2nd person | Reflexive |
|---|---|---|---|
| Nominative | азъ (azŭ) | тꙑ (ty) | — |
| Accusative | мѧ (mę) | тѧ (tę) | сѧ (sę) |
| Genitive | мене (mene) | тебе (tebe) | себе (sebe) |
| Locative | мьнѣ (mĭně) | тебѣ (tebě) | себѣ (sebě) |
| Dative | мьнѣ (mĭně), ми (mi) | тебѣ (tebě), ти (ti) | себѣ (sebě), си (si) |
| Instrumental | мъноѭ (mŭnojǫ) | тобоѭ (tobojǫ) | собоѭ (sobojǫ) |
| Possessive | мои (moi) | твои (tvoi) | свои (svoi) |
| Dual | 1st person | 2nd person | Reflexive |
| Nominative | вѣ (vě) | ва (va) | — |
| Accusative | на (na) | ва (va) | сѧ (sę) |
| Genitive | наю (naju) | ваю (vaju) | себе (sebe) |
| Locative | наю (naju) | ваю (vaju) | себѣ (sebě) |
| Dative | нама (nama), на (na) | вама (vama), ва (va) | себѣ (sebě), си (si) |
| Instrumental | нама (nama) | вама (vama) | собоѭ (sobojǫ) |
| Possessive | нашь (našĭ) | вашь (vašĭ) | свои (svoi) |
| Plural | 1st person | 2nd person | Reflexive |
| Nominative | мꙑ (my) | вꙑ (vy) | — |
| Accusative | нꙑ (ny) | вꙑ (vy) | сѧ (sę) |
| Genitive | насъ (nasŭ) | васъ (vasŭ) | себе (sebe) |
| Locative | насъ (nasŭ) | васъ (vasŭ) | себѣ (sebě) |
| Dative | намъ (namŭ), нꙑ (ny) | вамъ (vamŭ), вꙑ (vy) | себѣ (sebě), си (si) |
| Instrumental | нами (nami) | вами (vami) | собоѭ (sobojǫ) |
| Possessive | нашь (našĭ) | вашь (vašĭ) | свои (svoi) |