Mackellar, Angus a Presbyterian minister, was born in Scotland near the close of the 18th century, was ordained to the charge of Carmunnock, in the west of Scotland, in 1812, accepted a call to Pencaitland in 1814, was moderator of the Church of Scotland in 1840, and when the disruption came was one of the acknowledged leaders of the Free Church. On leaving his country parish he removed to Edinburgh, and for some years exercised a sort of general superintendence over the missionary and educational interests of the Church. He was moderator of the Assembly of the Free Church in Scotland in 1852. He died May 11,1859. See Wilson, Presb. Hist. Almanac, 1860, p. 263.