One person who researched this family said that they are descended from a Henry McCauley,
who had a son, the Rev. John, a minister in Dumbartonshire. And that Rev. John married Katherine Buchanan and had the following issue:
James, pedigree below, who went to Virginia
Alexander, who followed James to VA
John, who also emigrated to VA
Isobel, who married Alexander Monarch
The above descent is unproven. If I had to guess, I would say that the James Buchanan Macaulay who emigrated to Canada would be more likely the James mentioned above.
1.Capt. James Jonathan McCauley, findagrave 156567393
b. 1746, Stirling, Scotland; died 1810, West Virginia; m.
1773 Elizabeth Catherine Watson
2.Rebecca, 1776-1820, m. 1794 William George Bennett, son of Joseph Bennett, native of Scotland.
3.Rachel, 1795-1885, m. David Alkire, d. 1866.
3.Phebe, 1797-1875, m. 1815 James Mathew Keith.
3.Margaret, b. 1800, m. Robert McCray
3.Hannah, 1805-1866, m. John Anderson
3.Joseph P., m. 1. Mary Coleman; m. 2. Elizabeth Loudin; m. 3. Sarah C. Perkins
3.Elizabeth, 1807-1871, m. James Sprigg
3.William, 1808-1882, m. ?
3.Jonathan McCally Bennett, lawyer and statesman, m. Margaret Elizabeth Jackson, dau of Capt. George W. Jackson.
2.Susannah McCally/McCauley, 1788-1866; m. 1. in 1805 John Boposen Bouse.
3.Jesse Bouse, 1806-1871.
Susannah m. 2. Wilson Haymond c. 1807
3.Wilson McCauley Haymond, 1809-1888, m. Sarah Curry McCartney.
Susannah m. 3. George Strunk Riffle in 1810.
3.Jonathan McCauley Riffle, 1811-1899, m. Barbara Riffle
3.Phoebe B. Riffle, 1812-1871, m. 1834 William B. McCartney
3.Rev. George Strunk Riffle, 1814-1884 m. 1835 Rebecca Peterson McCartney; m. 2. 1860 to
Martha Ann Strader; m. 3. 1872 Delilah Elizabeth Woodalll Johnston
Susannah m. 4 in 1817 Andrew Jackson McKissic, Sr.
3.Rachel B. McKissic, 1818-1890
3.Elizabeth W. McKissic, 1820-1907, m. John Fletcher Wesley Holt.
3.Mary Jane McKissic, b. 1822, m. Leroy A. Griffin
3.Margaret M. McKissic, 1825-1901, m. 1853 William Parker Pritt
3.Andrew Jackson McKissic, 1827-1905, m. 1. Mary Coger; m. 2. Sarah Catherine Snyder.
3.John Thomas McKissic, 1829-1882, m. Mary Ann Snyder
3.Henry J. McKissic, b. 1832
2.Henry G. McCally, b. 1789, West Virginia, m. Sarah M. Alkire
3.John Samuel McCally, 1816-1905, m. 1838 Mary Jane Burkhammer
3.Elizabeth Watson McCauley, 1818-1887, m. Benoni T. Powers, d. 1891.
3.Susan P. McCally, 1820-1887 m. Jonathan Wheeler, died 1884
3.Solomon P., 1823-1890; m. Jane Blackburn
3.Lysander B., 1825-1898, m. Elizabeth Harris
3.Joseph Holt M., 1825-1916 m. 1854 Nancy Caroline Sepe, d. 1876.
3.Sarah Amarillis McCauley, 1837-1905, m. Cary C. Duncan, d. 1907.