Wikipedia
Idumban
Idumban is a great devotee of Lord Muruga and a greatest disciple of sage Agastya according to Hindu mythology.Idumban is also seen as one of the guardian of Muruga's temples in Tamil Nadu. During ThaiPoosam celebrations in the Tamil month of Thai (January),Tamil people observes a ritual practice of kavadiyaatam to obtain blessings from God Muruga.In this ritual practise before entering into muruga shrine people used to worship Idumban.