Poovantanthoppe is the former name of Swamithope

Swamithope

Swamithope is the name of a town that lies southeast of the City of Nagercoil, the capital of the District of Kanyakumari in the State of Tamil Nadu, at the extreme southern tip of India...

. This name was because the present-day Swamithoppe was then the grove of Poovandar a land lord. He was a devotee of Ayya Vaikundar

Ayya Vaikundar

Ayya Vaikundar , according to Akilattirattu Ammanai , a scripture of the Ayyavazhi, was a Manu Avatar of Narayana, incarnated as Muthukutty or Mudisoodum Perumal, a Nadar of Swamithoppe, Tamil Nadu Ayya Vaikundar , according to Akilattirattu Ammanai (or Akilam), a scripture of the Ayyavazhi, was...

 and he donated the land to the Swamithoppe Pathi. Backing with some quotations in Akilattirattu Ammanai

Akilattirattu Ammanai

Akilathirattu Ammanai , also called Thiru Edu , is the main religious text of the Tamil belief system Ayyavazhi...

 there is a strong belief that this poovandar was the one who warned the Kalineesan

Kalineesan

Kalineesan is someone who was caught by Kalimayai according to Akilattirattu Ammanai, the source of Ayyavazhi mythology. Kaliyan is the sixth fragment of Kroni and Kalineesan. According to Ayyavazhi mythology, the kalimayai captured the King of Travancore and henceforth was called Kalineesan....

before he came to arrest Vaikundar.