Why does every Thai person have a nickname?

Almost every Thai person carries two names — the formal one on their ID card, and a chêu-lên (ชื่อเล่น), the nickname they are actually called. What sets Thailand apart is which one wins: in everyday life the nickname does the work — at home, at school, at the office, and even in news reports.

The nickname is typically bestowed at birth by relatives, and is commonly a single syllable — or worn down from two syllables to one. The small minority without one tend to use a shortened form of their formal given name instead.

Sukhothai era: nicknames marked birth order

In the Sukhothai era, nicknames were used to mark a child's order in the family: Ai (อ้าย), Yee (ยี่) and Sam (สาม) designated the first, second and third child. It was a simple, practical system for large households.

As time went on the names turned descriptive — Daeng (แดง) for a child's colouring, Uan (อ้วน) for a chubby baby — or aspirational, borrowing something precious like Thong (ทอง, gold).

Deliberately unflattering names, to fool the spirits

The most striking origin of the Thai nickname is a spiritual one. It was believed that a child with too beautiful a name might be coveted by malicious spirits and taken away. So deliberately unflattering nicknames — Mah (หมา, 'dog'), Moo (หมู, 'pig'), Gop (กบ, 'frog') — were used precisely to make the child seem unappealing to them.

The same belief system explains another Thai habit that is virtually unknown elsewhere: changing your name when life turns difficult. Tradition holds that a name change confuses the malicious ghosts and spirits that have been following you.

The modern era: Benz, Porsche and Google

Today's nicknames have gone thoroughly global. Walk through a Bangkok office and you may be introduced to a Benz, a Porsche or a Big Mac; Google, Internet and Man U are all documented as real nicknames too.

One thing has never changed: the nickname seldom relates to the registered name at all — except when it is a diminutive, like Nok ('bird') from Noknoi ('little bird'). The nickname remains the family's free space, governed by no rules.

Why nicknames don't follow the birth-day rules

A point that often confuses parents: Thaksa-Pakorn — avoiding the kalakini letters of the birth day — applies to the chêu-jing, the formal registered name. The nickname is not tied to the birth day at all and can be anything you like.

That is why this site keeps the two strictly apart: the birth-day directories list formal firstnames only, while nicknames can be browsed freely no matter which day your baby was born.