The ancient name of the town was probably Alpiya meaning "Luminus Water country". The Greek population called the town Alepli. The word Alpullu seems to be of theHittite origin.
Sources:
- Alpullu - The Archaeological Settlements of Turkey - TAY Project
- Kırklareli - Alpullu - http://wowturkey.com/forum/viewtopic.php?t=34743.