The surname al'Dai can refer to the following people:
- Bili al'Dai - a resident of the Two Rivers and son of Hu.
- Hu al'Dai - a farmer in the Two Rivers and father of Bili.
- Lem al'Dai - a resident of the Two Rivers who likes to fight with his fists.
- Rad al'Dai - a resident of the Two Rivers and part of Perin Aybara's army.