Venneesan was a mythical figure found in Ayyavazhi mythology sect of Hinduism.
While Kalineesan was performing tavam in order to gain a child, he was distracted by the scene of a cleric embracing a woman.
A white crane came and swallowed the semen, became pregnant, and delivered a baby boy in the water.
By the techniques he learned from the sage he earned a large amount of gold and silver and piled them as mountains.
On hearing this, a man in his country told him that there were 56 nations which were once ruled by three powerful kings known as Cheras, Cholas and Pandyas.
Meanwhile, due to a curse from some girls of Deiva Loga, the three kings lost their kingdom and their relatives died (including all their children and wives).
At once he formed a great army and defeated Venneesan by the grace and mercy of Thirumal.