Son of Othenan) is a 1970 Indian Malayalam-language action drama film directed and produced by Kunchacko.

The film stars Prem Nazir, Ragini, Sathyan, Sheela and Kaviyoor Ponnamma.

One day, the legendary warrior from the north, Thacholi Manikkoth Othenan, finds himself at the door of Thekkumpattu house.

At this point Kunji wishes that she might bear a son who can avenge the insult that Chandutty has inflicted on her family.

Othenan leaves in the morning with a promise to return on the day of the coming festival to face off Chandutty, liberate Kunji and marry her.

When Othenan reaches home, his well-known courting of Kavil Chathothe Kunki means that he is expected to marry her on the day of the festival.

Her happiness is, however, short lived as she soon learns about Othenan and Kunki's marriage ironically from none other than the unsuspecting Chandutty who was invited.

Twenty years later, Ambu has grown into a brave, able young man, trained in martial arts by Kunji.