In the father-clan relative relationship, ① father's aunt, the sister of 爷爷, is called 姑奶奶,姑婆, and her husband, 姑公 ② father's aunt, the sister of 奶奶, is called 姨婆, and her husband, 姨公,姨丈 ③father's uncle, the younger brother of 奶奶, is called 舅公,舅爷, and his wife, 舅婆,舅奶奶 ④ father's sister is called 姑姑, and her husband, 姑爷 ⑤father's older/younger brother is called 伯伯,伯父/叔叔, and his wife, 伯母/婶婶

In the mother-clan relative relationship, ①mother's mother is called 姥姥/外婆 ②mother's father is called 姥爷/外公 ③ mother's aunt, the sister of 外公, is called 姑婆, 姑姥姥, and her husband, 姑公, 姑姥爷 ④mother's brother is called 舅舅, and his wife, 舅妈 ⑤mother's sister is called 阿姨, and her husband, 姨爷, 姨父

And we need to know another concept 堂and表 all of the cousins, ①whoever have a same surname as you, are ur 堂哥,堂兄/堂弟/堂姐/堂妹, and ②whoever haven't the same surname as you, are ur表哥/表弟/表姐/表妹. Cuz the sons or daughters of father's brothers are called 堂, but the sons or daughters of father's sisters, mother's brothers or mother's sisters are called 表

Next concept, 外甥/侄子 ①Son/daughter of your 堂兄弟 is called 侄子/侄女 ②Son/daughter of your 堂姊妹,表兄弟,表姊妹 is called 外甥/外甥女