John Stuart Falconar (or just John Falconar), born 17 Aug. 1777 in Queen Anne's Co., Md., died 30 June 1854 in Montgomery, Alabama, was buried in Oakwood Cemetery. He never married. He was the son of William and Jane (Massey) Falconar, grandson of John and Catharine (Barnes) Falconar, and great-grandson of Gilbert Falconar (1686-1736), a native of Edinburgh, who came to Maryland about 1703.
Elizabeth, born about 1841 (m. 10 July 1861 John D. Wall), was the daughter of William Joseph Falconer (b. 13 Oct. 1814, d. 27 Aug. 1866) and Mary E. Wilder. William J. was the son of William Falconer (b. 17 Oct. 1780, d. 7 June 1840 Montgomery Co., AL) and his first wife Ann Singleton (b. 31 Aug. 1782, d. 27 Aug. 1815 Manchester, SC).
This family is covered in my book "Falconer of Halkerton" (Bowie, Md.: Heritage Books, 1997), which is now, unfortunately, out of print. I'd be interested in more information on Elizabeth or her brother and sisters, if you have any. I couldn't carry her any further down.