brother 兄弟

sister 姐妹

full brother,brother-germane 亲兄弟

full sister,sister-german 亲姐妹

half brother 同父异母兄弟,同母异父兄弟

half sister 同父异母姐妹,同母异父姐妹

stepbrother 继兄弟

stepsister 继姐妹

foster brother 同奶兄弟

uterine brother 异父兄弟

twin brother 双胞胎

brother-in-law 堂兄弟,表兄弟

sister-in-law 堂姐妹,表姐妹

brother of one's brother-in-law姻兄弟

sister of one's sister-in-law 姻姐妹

brotherhood 手足情,兄弟之情

brotherly love 兄弟之爱

fraternity 友爱

confraternity 友爱关系

grandparents 祖父母

grandfather 祖父

grandad, grandpa 爷爷

grandmother 祖母

granny,gran,nanny,grandma 奶奶

step-grandfather 教祖父

step-grandmother 教祖母

great-grandfather 曾祖父

great-grandmother 曾祖母

great-great-grandfather 高曾祖父

great-great-grandmother 高曾祖母

grandchildren 孙子女

grandson 孙

granddaughter 孙女

great-grandson 曾孙

great-granddaughter 曾孙女

great-great-grandson 玄孙

great-great-granddaughter 玄孙女

uncle 叔父,伯父,舅父,姑父

aunt 婶母,伯母,舅母,姑母

aunty, auntie 婶婶,大妈,姑妈,舅妈

my uncle on my mother's side 舅父

great-uncle,granduncle 叔祖父,伯祖父,舅老爷,姑老爷

great-aunt,How to Interpret "Oct" in English?grandaunt 婶祖母,伯祖母,姑姥姥

nephew 侄,外甥

niece 侄女,外甥女

great-nephew 侄孙,甥孙

great-niece 侄孙女,甥孙女

cousin 堂兄妹,表兄妹

cousin-in-law 姻堂兄妹,姻表兄妹

first cousin 第一代堂兄妹,第一代表兄妹

second cousin 第二代堂兄妹,第二代表兄妹

first cousin once removed 远堂兄妹,远表兄妹

distant cousin 远表兄妹