James John Lonsdale (1810–1886), second son of James Lonsdale the artist (1777–1839), was born on 5 April 1810. He was called to the bar at Lincoln's Inn on 22 November 1836. He was secretary to the Criminal Law Commission in 1842. He was recorder of Folkestone from 5 August 1847 to the time of his death. He was judge of circuit No. 11 in the West Riding of Yorkshire from 14 February 1855 to 19 March 1867 and judge of circuit No. 48 in Kent from 19 March 1867 to March 1884. He died at The Cottage, Sandgate, Kent, 11 November 1886.
He was the author of: