Family words in Thai: mom, aunt, uncle, พี่ and น้อง

English has one word for grandma. Thai has two, and choosing between them means knowing whose mother she is. Add a whole set of aunts and uncles sorted by age, cousins called “older” or “younger”, and a market where the noodle seller is your auntie too, and family gatherings start to feel like a quiz.

It isn’t one. It’s a system with two rules, and once you see them, the words fall into place.

How do Thai family words work?

Thai family words run on age and side. Most of them tell you whether someone is older or younger, and for your parents’ brothers, sisters and parents, whether they’re on your mum’s side or your dad’s. The Every Culture summary of Central Thai kinship puts it simply: most kinship terms indicate the relative ages of people.

Gender matters less than you’d expect. English asks “brother or sister?”, Thai asks “older or younger?” first.

Pi and nong: older and younger

พี่ (phii) is an older sibling, cousin or friend; น้อง (norng) a younger one. Brother or sister, it’s the same word.

พี่

phii

Draft: waiting for a native speaker’s review.

น้อง

norng

Draft: waiting for a native speaker’s review.

Cousins are ลูกพี่ลูกน้อง (luuk phii luuk norng), literally “child of the older, child of the younger”, and in everyday talk families call them พี่ and น้อง too. How a family ranks its cousins can vary, so if you’re not sure, ask.

With siblings, age comes first. That’s why your Thai cousin might introduce a sibling as their พี่ and you won’t know if it’s a man or a woman until they walk in.

Pa, lung, na, aa: which aunt or uncle?

This is where side comes in. Your parents’ older siblings are ป้า (paa, the women) and ลุง (lung, the men), on either side. Their younger siblings get one word per side, for men and women alike: น้า (naa) on mum’s side, อา (aa) on dad’s.

So your mum’s little sister is น้า, and so is her little brother. Your dad’s big sister is ป้า, and so is your mum’s.

Yai, ya, ta, pu: which grandparent?

Grandparents split by side too.

Many luk khrueng have one Thai parent, so here’s the part that surprises people: the words follow the side, not the nationality. If your dad is the non-Thai parent, his mother is still your ย่า when you speak Thai. Your Thai mum’s mother is your ยาย.

One small trap: ยาย (yaai) has a long vowel. Families often write her name as Yai in English, but the short-vowel nickname Yai, “big”, is a different word.

And what do they call you? หลาน (laan), which means grandchild and also niece or nephew. To your parents you’re ลูก (luuk), child. Your ป้า calls you หลาน too.

Why does the noodle seller call me nong?

Because Thai uses family words for people who aren’t family at all. As Wikipedia’s article on the Thai language notes, it is much more common for unrelated strangers to call each other พี่, น้อง, ลุง, ป้า, น้า, อา, ตา or ยาย than to use the polite word for “you”.

In practice:

• Someone a bit older than you, a friend’s friend, an older colleague, the person serving you: พี่. The word reaches into schools, workplaces and friend groups.
• Someone younger: น้อง. That’s why a shop assistant might call you พี่ and an older vendor might call you น้อง.
• Someone around your parents’ age or older: ป้า or ลุง. One Thai teacher’s rule of thumb is ป้า if she seems older than your mum, and ลุง if he seems older than your dad. Calling an older man ลุง sets a friendly, informal tone.

Family words usually come with a name or nickname after them, like พี่ plus a nickname. Our guide to Thai nicknames covers the names themselves.

Mum calls herself “mum”: family words as I and you

Here’s the one that sounds strange in English but feels warm in Thai. Family words don’t only name people. They work as “I” and “you”.

A mother talking to her child often calls herself แม่ (mae), and calls the child ลูก. “แม่ไปก่อนนะ” (mae pai gorn na) is “Mum’s going now”, meaning “I’m going now”.

แม่

mae

Draft: waiting for a native speaker’s review.

It works in both directions. You can say หลาน about yourself to Yai, and call your aunt ป้า to her face where English would say “you”. Wikipedia’s honorifics article describes kinship terms used as pronouns “to elevate or demonstrate solidarity with” the person you’re talking to. Elevate and solidarity: respect and closeness at the same time.

If your Thai already sounds like this, that’s not a flaw. It’s the family register, and we wrote about it in why your Thai sounds like your mum.

What if I’m not sure what to call someone?

Nobody expects you to have a perfect family chart in your head. A few safe bets help:

• A stranger you’re unsure about: คุณ (khun) plus their name. Thai Holiday Guide recommends it as safer than guessing a kinship term, especially with strangers and officials.
• Someone a little older you’re getting to know: พี่. It’s the everyday warm choice.
• More respect for a family word: Thai can put คุณ in front of a kinship term to make it more formal.
• A relative you can’t place: ask. “Is she older or younger than Mum?” answers most of it.

Getting a word wrong at a family lunch is a very normal luk khrueng moment. The person usually just tells you the right one, and now you know.

If your family speaks Isan at home, here are a few Isan words for visiting family in the Northeast.

Want to practise before the next family call? See learning Thai to talk to your family, or look up any of these words in the glossary.

Try the Who’s who chart

In Reply Thai, the Who’s who moment lays these words out as a family chart: grandparents by side, aunts and uncles by age, and the words they use for you. If you’ve told the app who your grandma is, her square is marked “Your Yai”.

Reply Thai for iPhoneComing soon

Thai words on this page are a draft until a native speaker has reviewed them. Family words can vary between regions and families.