I am seeking additional information on the following family. I want to know of additional children/grandchildren and the parents of Walter Brown. Was he the son of a Baltimore merchant by the name of John Brown?

This Walter was a "gentleman farmer" of Ellicott City. His children were married in Baltimore County; he and much of his family were buried in New Elkridge Meeting House Cemetery and may or may not have been Quakers. He owned Brown's Tavern where he was Postmaster. His son Richard Brown was a "gentleman" in Prince George's County.

I. Walter Brown b. 1773 d. 7 Dec 1849
-m. (1) Ruth Sheriff
-m. (2) Ruth Hamilton
-----A. Richard B. Brown b. 2 Nov 1813 d. 3 Dec 1865
------m. Sophia Falconer b. 1820
-----B. Mary Ann Brown b. 1813 d. 1873
------m. John Vansant b. 1812
----------i. William Vansant b. 1838
----------ii. Walter Brown Vansant b. 1840
----------iii. Richard W. Vansant b. Feb 1842
----------iv. Isaiah Vansant b. 10 Apr 1844 d. 10 Jun 1845
----------v. Emily Jane Vansant b. 1845 d. 1845
----------vi. James Edgar Vansant b. 1846
----------vii. John Wesley Vansant b. 10 Mar 1849 d. 23 Aug 1852
-----C. Jane Dorson Brown b. 1815 d. 11 Aug 1864
------m. Mahlon Falconer
----------i. James W. Falconer b. Aug 1842 d. 12 May 1844
----------ii. William George Falconer b. 4 Oct 1844 d. 17 Dec 1850
----------iii. Richard T. J. Falconer b. Dec 1846 d. 5 Dec 1911
-----------m. Emma E. Flenner b. Dec 1847 d. 22 Nov 1921
---------------1. William Alfred Falconer b. 22 Nov 1872 d. 24 Apr 1950
----------iv. Albert B. Falconer b. 1850 d. 6 Sep 1868
----------v. Edward J. Falconer b. 1853
-m. (3) Susan Sinnard, daughter of Abraham Sinnard and Elizabeth Graff/Grove, widow of Thomas Bodley