| 1 | Russian | бой | beating, breakage; battle, combat, engagement;... |
| 2 | English | boy | A young male; A male child: a son of any age; A... |
| 3 | Middle English | boye | servant, commoner, knave, boy |
| 4 | Old English | bōia | boy |
| 5 | Proto-Germanic | bōjô | younger brother, young male relation |
| 6 | Proto-Germanic | bō- | A stem meaning "father, brother, close male... |
| 7 | Proto-Indo-European | bʰā- | to say |