From Proto-Slavic *bratrъ, *bratъ.
братръ • (bratrŭ) m
| singular | dual | plural | |
|---|---|---|---|
| nominative | братр{{{2}}}ъ bratr{{{2}}}ŭ |
братр{{{2}}}а bratr{{{2}}}a |
братр{{{2}}}и bratr{{{2}}}i |
| genitive | братр{{{2}}}а bratr{{{2}}}a |
братр{{{2}}}оу bratr{{{2}}}u |
братр{{{2}}}ъ bratr{{{2}}}ŭ |
| dative | братр{{{2}}}оу, братр{{{2}}}ови bratr{{{2}}}u, bratr{{{2}}}ovi |
братр{{{2}}}ома bratr{{{2}}}oma |
братр{{{2}}}омъ bratr{{{2}}}omŭ |
| accusative | братр{{{2}}}ъ, братр{{{2}}}а bratr{{{2}}}ŭ, bratr{{{2}}}a |
братр{{{2}}}а bratr{{{2}}}a |
братр{{{2}}}ꙑ bratr{{{2}}}y |
| instrumental | братр{{{2}}}омъ bratr{{{2}}}omŭ |
братр{{{2}}}ома bratr{{{2}}}oma |
братр{{{2}}}ꙑ bratr{{{2}}}y |
| locative | братр{{{2}}}ѣ bratr{{{2}}}ě |
братр{{{2}}}оу bratr{{{2}}}u |
братр{{{2}}}ѣхъ bratr{{{2}}}ěxŭ |
| vocative | братр{{{2}}}е bratr{{{2}}}e |
братр{{{2}}}а bratr{{{2}}}a |
братр{{{2}}}и bratr{{{2}}}i |
| отьчьство (otĭčĭstvo, “family”) | Male | Female |
|---|---|---|
| parent родител҄ь (roditelʹĭ) |
отьць (otĭcĭ), авва (avva, “father”) | мати (mati, “mother”) |
| sibling | братръ (bratrŭ, “brother”) | сестра (sestra, “sister”) |
| child | сꙑнъ (synŭ, “son”) | дъщи (dŭšti, “daughter”) |
| grandparent | дѣдъ (dědŭ, “grandfather”) | баба (baba, “grandmother”) |
| grandchild | въноукъ (vŭnukŭ, “grandson”) | – (“granddaughter”) |
| great-grandparent | прѣдѣдъ (prědědŭ, “great-grandfather”) | – (“great-grandmother”) |
| mother's sibling | оуи (ui, “maternal uncle”) | – (“maternal aunt”) |
| father's sibling | стрꙑи (stryi, “paternal uncle”) | – (“paternal aunt”) |
| sibling's child | братанъ (bratanŭ), сꙑновь (synovĭ), сꙑновьць (synovĭcĭ, “nephew”) | братана (bratana, “niece”) |
| cousin | братоучѧдъ (“male cousin”) | братоучѧда (“female cousin”) |
| spouse | мѫжь (mǫžĭ), чрьтожьникъ (črĭtožĭnikŭ), малъженъ (malŭženŭ, “husband”) | жена (žena), чрьтожьница (črĭtožĭnica), съложь (sŭložĭ, “wife”) |
| parent of wife | тьсть (tĭstĭ, “father-in-law (wife's father)”) | тьща (tĭšta, “mother-in-law (wife's mother)”) |
| parent of husband | свекръ (svekrŭ, “father-in-law (husband's father)”) | свекрꙑ (svekry, “mother-in-law (husband's father)”) |
| sibling of husband | дєвєръ (deverŭ, “brother-in-law (husband's brother)”) | зълꙑ (zŭly, “sister-in-law (husband's sister)”) |
| spouse of child | зѧть (“son-in-law (daughter's husband)”) | снъха (snŭxa, “daughter-in-law (son's wife)”) |
| spouse of husband's brother | – | етрꙑ (etry), кѫпетра (kǫpetra, “sister-in-law (husband's brother's wife)”) |
| stepchild | пасторъкъ (pastorŭkŭ, “stepson”) | – (“stepdaughter”) |
| step-parent | отьчимъ (otĭčimŭ, “stepfather”) | мащеха (maštexa, “stepmother”) |