Synonyms and related words :
aunt, auntie, blood brother, brethren, brother, bub, bubba, bud, buddy, child, country cousin, cousin, cousin once removed, cousin twice removed, daughter, descendant, father, first cousin, foster brother, foster child, frater, grandchild, granddaughter, grandnephew, grandniece, grandson, granduncle, great-aunt, great-uncle, half brother, heiress, junior, kid brother, lad, laddie, mother, nephew, niece, nuncle, nunks, nunky, offspring, scion, second cousin, sis, sissy, sister, sister-german, sistern, son and heir, sonny, stepbrother, stepchild, stepdaughter, stepsister, stepson, stripling, tad, unc, uncle, uncs, uterine brother