Wikipedia
Somananda
Somananda (875–925 CE) was one of the teachers of Kashmir Shaivism, in the lineage of Trayambaka, author of the first philosophical treatise of this school, Śivadṛṣṭi. A contemporary of Bhaṭṭa Kallaṭa, the two formed the first wave of Kashmiri Shaivites to propose in a rigurous and logical way the concepts of nondual Saivism. Somananda lived in Kashmir, most probably in Srinagar, where most of the later philosophers of the school lived, as a householder.