There are many stories about how Amboori got its name. The first one is that the tribal settlers had a rice variety which will flower and ripen in a single day! It is called "Annoori Nellu". Later Annoori became Amboori. There is another story which is related to Chadachi Marthandan Pillai, who was a great archer of King Marthanda Varma. Once, the Chadachi Marthandan Pillai was participating in an archery competition in a place called Ottashekharamangalam. He shot an Arrow (Ambu) which landed in a tree at a far away place. While removing (oori) the arrow from the tree, he has placed a special marking in it. Later the surrounding area has known as Amboori (Removed the Arrow).