What is "sambandar"

Sambandar (also called Thirugyana Sambandar, Tirugnana Sambanthar, Campantar, Champantar, Jnanasambandar, Gnanasambandar) was a young Saiva poet-saint of Tamil Nadu who lived around the 7th century CE.

He is one of the most prominent of the sixty-three Nayanars, Tamil Saiva bhakti saints who lived between the sixth and the tenth centuries CE. Sambandar's hymns to Shiva were later collected to form the first three volumes of the Tirumurai, the religious canon of Tamil Saiva Siddhanta. He was a contemporary of Appar, another Saiva saint.