Synonyms of 'blood brother'

aunt, auntie, brethren, brother, Bub, Bubba, Bud, Buddy, country cousin, cousin, daughter, father, first cousin, foster brother, frater, grandnephew, grandniece, granduncle, great-aunt, great-uncle, half brother, mother, nephew, niece, nuncle, second cousin, Sis, sissy, sister, son, stepbrother, stepsister, uncle