Andrew Bonar Law (known as Bonar; 16 September 1858 – 30 October 1923) was a British Conservative Party statesman and Prime Minister. Born in the colony of New Brunswick, he is the only British Prime Minister to have been born outside the British Isles. He was also the shortest-serving Prime Minister of the 20th century, spending 211 days in office.

Law was born to a rural preacher and his wife in New Brunswick, where he spent his early life. A few years after his mother's death in 1861, his father remarried, and in 1870 Law moved to Helensburgh, Scotland, to live with his mother's sister Janet and her family, who ran a successful merchant bank. After an education at a preparatory school in Hamilton and the High School of Glasgow, Law left school aged sixteen to gain a "commercial education" at the family firm. A few years later the firm was sold to the Clydesdale Bank, putting Law's career in jeopardy until his uncles loaned him the money to buy a partnership in an iron merchants firm. Through hard work and his business acumen the firm flourished under Law, and by the time he was thirty he was a comparatively rich man.

Andrew Alexander Bonar (Edinburgh May 29, 1810 – December 30, 1892 in Glasgow) was a minister of the Free Church of Scotland and youngest brother of Horatius Bonar.

Bonar studied at Edinburgh; was minister at Collace, Perthshire, 1838 – 1856 (both in the Church of Scotland and the Free Church); and of Finnieston Free Church, Glasgow, 1856 till his death. He joined the Free Church in 1843, and was its moderator in 1878. He was identified with evangelical and revival movements and adhered to the doctrine of premillennialism. With Robert Murray McCheyne he visited Palestine in 1839 to inquire into the condition of the Jews there. During the visit of Dwight L. Moody to Britain in 1874 and 1875, Moody was warmly welcomed by Bonar, despite the latter receiving considerable criticism from other Calvinist ministers in the Free Church.

Bonar also edited Samuel Rutherford's Letters (1863); and wrote many tracts, pamphlets, and minor biographies.

His daughter Marjory edited his Diary and Letters, his Reminiscences, Heavenly Springs (ISBN 0-85151-479-0) (Portions selected from his diary, letters, and sermons), and Wayside Wells (Thoughts for Sabbath evenings, selected from his writings and sermons).

Horatius Bonar (19 December, 1808 – 31 May, 1889) was a Scottish churchman and poet.

The son of James Bonar, Solicitor of Excise for Scotland, he was born and educated in Edinburgh. He comes from a long line of ministers who have served a total of 364 years in the Church of Scotland. One of eleven children, his brothers John James and Andrew Alexander were also ministers of the Free Church of Scotland. He had married Jane Catherine Lundie in 1843 and five of their young children died in succession. Towards the end of their lives, one of their surviving daughters was left a widow with five small children and she returned to live with her parents. Bonar's wife, Jane, died in 1876. He is buried in the Canongate Kirkyard.

In 1853 Bonar earned the Doctor of Divinity degree at the University of Aberdeen.

He entered the Ministry of the Church of Scotland. At first he was put in charge of mission work at St. John's parish in Leith and settled at Kelso. He joined the Free Church at the time of the Disruption of 1843, and in 1867 was moved to Edinburgh to take over the Chalmers Memorial Church (named after his teacher at college, Dr. Thomas Chalmers). In 1883, he was elected Moderator of the General Assembly of the Free Church of Scotland.