Sudalai Madan or Madan, is a regional Tamil male deity who is popular in South India, particularly Tamil Nadu. He is considered to be the son of Shiva and Parvati. He seems to have originated in some ancestral guardian spirit of the villages or communities in Tamil Nadu, in a similar manner as Ayyanar.
Read more about Sudalai Madan: God of The Dispossessed, Madathy Amman (Goddess Madathy), Harichandran, Outside India