Up to 18th century, this land was a part of "Ilayidathu Swaroopam". At that time, most of the leaders (Malayalam: Thalavanmaar) in the Ilayidathu Swaroopam were from this place. They headed various departments of this royal dynasty. Hence this place came to known as "Thalavoor", meaning "Thalavanmaarude Ooru" i.e. "The Place of Leaders".