GWYNNE, John Wellington, Canadian jurist, born in Castle Knock, County Dublin, Ireland, 30 March, 1814. He was educated at Trinity college, Dublin, and came to Canada in 1832. He studied law in Kingston, and was admitted to the bar of Upper Canada in 1837. From 1845 till 1852 he devoted himself to the formation and maintenance of a company for the construction, as part of a scheme of colonization, of a railway from Toronto to Lake Huron. He was an unsuccessful candidate for the legislative assembly of Canada in 1847, and was appointed a judge of the court of common pleas of Ontario in November, 1868. He declined appointment as one of the permanent judges of the court of appeal of Ontario in May, 1874, and was appointed a justice of the supreme court in January, 1879. He was a member of the law-reform commission in 1871, and of the senate of the University of Toronto in 1873.