Oru Thaai Makkal (Tamil: ஒரு தாய் மக்கள் English: Sons of a Mother), is a 1971 Indian Tamil romantic comedy-drama directed by Pa.Neelakandhan, starring M. G. Ramachandran in the lead role, with M. N. Nambiar, J. Jayalalitha, R. Muthuraman, among others enacting supporting roles. The film was a remake of Hindi film Ayee Milan Ki Bela.
Kannan (MGR) is a manager in charge of a collective farm who falls in love with Radha (Jayalalitha), daughter of the leader of the farm, Selvanayagam (S. A. Ashokan). When Ravi (R. Muthuraman), cousin of Radha comes to the farm after finishing education in London, he becomes a good friend of Kannan. Ravi is Kannan 's brother adopted by Radha's aunt and uncle, Namasivayam (Tiruchi Selandhar Rajan) and has hopes on Radha. Rathnam (M. N. Nambiar) a drunkard officer of the farm steals and sells the farm's paddy. He is caught red handed to Kannan, who sacks him but doesn't disclose the reason to anyone.
When Ravi, Radha and Kannan go to inspect a new land for a farm, at night, Ravi sees Kannan and Radha are talking in love. When Ravi realizes that they are in love, he becomes vengeful.
Rathnam gets the chance to avenge Kannan for sacking him. With the help of two women he had relationships and now pregnant, he frames Kannan for theft, fraud and rape. Women help him reluctantly in the hope that he will marry them and save them from dishonour. Kannan escapes from the village swearing that he will prove his innocence.
Radha is forced to marry Ravi.
Kannan comes to Rathnam with a gun to threat him to confess but he is outnumbered by Rathnam and his henchmen and locked in a cage. Rathnam says to his men that he had no intention to marry a woman who helped him to frame Kannan and she hears it. Then she struggles but is put to the cage where she meets Kannan. They succeed in an escape plan and Kannan takes her to wedding feast. There she confesses and the other woman who helped Rathnam to frame Kannan also confesses. In this clash, Ravi drags Radha and boards a jeep. Kannan chases them by motorbike. In a rocky beach, they fight hand to hand and also with guns, then the people gathered at wedding come to beach.
Radha's aunt reveals that Ravi is Kannan's brother. Radha and Kannan reunite. Ravi gives up his vengeance.
The casting is established according to the original order of the credits of opening of the movie, except those not mentioned
The Hindi version of Oru Thaai Makkal is Ayee Milan Ki Bela (1964) by Mohan Kumar, with Rajendra Kumar, Dharmendra and Saira Banu.
The main casting and the screenplay remind a MGR of 1968, KANNAN EN KADHALAN.