[3][4] They have been politically active since 18th century, with many having posts such as Mudaliyars, a title for Ceylonese officials used under the Colony governments of Ceylon.
Arumuganathapillai rendered service to the British under the Kandyan Wars, in their attempt to gain control over the Kandy Kingdom.
Ponnambalam Ramanathan founded the Parameshwara College, which was later used by Sri Lankan government to establish the University of Jaffna.
[6] Sri Ponnambalam Vaneswarar Temple located in Colombo is also credited to be founded by the family.
[7] Sri Kurinji Easware temple is a temple located in Kodaikanal, Tamil Nadu is credited to have been built by a European woman, Leelawathy Ramanathan, the wife of Ponnambalam Ramanathan.