American actor, vocalist & manager. Né James Cassius Williamson. Born 26 July 1844, Mercer, Pennsylvania, USA. Married (1) Maggie Moore (actress), (2) Mary Weir (dancer). Died 8 July 1913, Paris, France.
On stage in USA, Australia and England from1860s. Arrived Australia in 1874 under engagement to George Coppin. Went to found Australia’s most important theatrical companies, J.C. Williamson Ltd.