Yung-chia Hsüan-chüeh (665-713)

An early T'ang dynasty Chinese Ch'an monk and a direct disciple of the sixth patriarch Hui-neng (638-713). Almost nothing is known about him, and a work reformulating the ideas of the Platform Sūtra of the Sixth Patriarch is attributed to him, although his authorship is not certain.

A Dictionary of Buddhism, Oxford University Press, 2003, 2004 (which is available in electronic version from answer.com)