Hrsikeshah is another name of Vishnu or God and is the 47th name in the Vishnu sahasranama. According to Adi Sankara' s commentary on the Vishnu sahasranama, the name has several meanings. Hrsikeshah means 1) the master of the senses or 2) He under whose control the senses subsist. Another meaning means, "He whose hairs consists of the rays of the sun and the moon which give joy to the world."

Reference: Cited from Sri Vishnu Sahasranama, commentary by Sri Sankaracharya, trasnlated by Swami Tapasyananda, available at Sri Ramakrishna Math, Chennai. available at India web site: http://www.sriramakrishnamath.org and US site: http://www.vedanta.com.