Yogiraj is a title of Lord Shiva

Shiva

Shiva is a major Hindu deity, and is the destroyer god or transformer among the Trimurti, the Hindu Trinity of the primary aspects of the divine. God Shiva is a yogi who has notice of everything that happens in the world and is the main aspect of life. Yet one with great power lives a life of a...

 meaning "King of Yoga." It is also an honorific often given to an advanced yogi

Yogi

A Yogi is a practitioner of Yoga. The word is also used to refer to ascetic practitioners of meditation in a number of South Asian Religions including Jainism, Buddhism, and Hinduism.-Etymology:...

, especially a teacherhttp://integralyogamexico.googlepages.com of yoga

Yoga

Yoga is a physical, mental, and spiritual discipline, originating in ancient India. The goal of yoga, or of the person practicing yoga, is the attainment of a state of perfect spiritual insight and tranquility while meditating on Supersoul...

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See Yogiraj Sri Swami Satchidananda and Swami Satchidananda

Swami Satchidananda

Swami Satchidananda , born as C. K. Ramaswamy Gounder, was an Indian religious teacher, spiritual master and yoga adept, who gained fame and following in the West during his time in New York. He was the author of many philosophical and spiritual books, including a popular illustrative book on Hatha...

, a world-guru who received this title from his guru, Master of Yoga Sri Swami Sivananda

Swami Sivananda

Swami Sivananda Saraswati was a Hindu spiritual teacher and a proponent of Yoga and Vedanta. Sivananda was born Kuppuswami in Pattamadai, in the Tirunelveli district of Tamil Nadu. He studied medicine and served in Malaya as a physician for several years before taking up monasticism...

Saraswati Maharaj, after arduous training, practice, and service in discipleship and to humanity. This title of Yogiraj is given by one's guru in lineages of established training.