foster brother

a boy brought up with another child of different parents.

Words nearby foster brother

before 1000; Middle English; Old English fōster brōthor

I was his foster-brother and playfellow, unequal as was our rank.
Wilson's Tales of the Borders and of Scotland|Various
But he kept off lawyers—and he sought out the only man he could remember—his foster-brother, Harborough.
The Borough Treasurer|Joseph Smith Fletcher
Myself have seen and known even a baby envious; it could not speak, yet it turned pale and looked bitterly on its foster-brother.
The Confessions of Saint Augustine|Saint Augustine
Now, the Prince had a foster-brother who was a very wicked man.
Boys and Girls Bookshelf (Vol 2 of 17)|Various

Do you remember your foster-brother who pulled you out of the water one day?
Sylvie: souvenirs du Valois|Grard de Nerval