Which side?
Your father's parents and your mother's parents are four different words, not two. 奶奶 and 外婆 are not synonyms.
A field guide to Chinese kinship
English has one word for grandmother, one for uncle, one for cousin. Chinese has two, five and eight — because every term tells you which side of the family, whether they are older or younger, and whose family you married into.
One word, two people
Your father's mother is 奶奶. Your mother's mother is 外婆 — or 姥姥 in the north. The same split runs through grandfathers, grandsons and nephews. It is not a vocabulary quirk; it is a different way of describing a family.
Read the grandmother guideGuides
Nine guides, each built around one question: which word is the right one, and why. Every term includes characters, pinyin, tone marks and audio.
Two words, two sides of the family.
Read the guide 爷爷 / 外公The same split, one generation up.
Read the guide 姐姐 / 妹妹Older or younger — the word says which.
Read the guide 哥哥 / 弟弟There is no neutral word for brother.
Read the guide 伯伯 / 舅舅Five men English calls “uncle”.
Read the guide 姑姑 / 姨妈Five aunts, split by side and marriage.
Read the guide 堂哥 / 表妹Eight words for one English cousin.
Read the guide 公公 / 岳父The word depends on who you are.
Read the guide 侄子 / 外甥Your brother's kids and your sister's kids.
Read the guideThe system
Once you can answer these three questions, you can predict a term you have never seen.
Your father's parents and your mother's parents are four different words, not two. 奶奶 and 外婆 are not synonyms.
There is no neutral “brother” or “sister”. 哥哥/弟弟 and 姐姐/妹妹 build age into the word itself.
Your father's brothers' children are 堂; everyone else's are 表. One English “cousin” becomes eight Chinese words.
Start here
An interactive five-generation chart, all 73 terms, the cousin matrix and the in-law tables — with a printable version for your notes.
Open the Chinese family tree