Here is some information I have on your inquiry.My info has not been proven.I don't find Littleton P. Ewell as a brother, but rather Littleton Parker Ewell is a relative according to my records.However, there may be a Littleton P. Ewell as a brother that I'm unaware of.Here is what I have:
FATHER: William EWELL Jr.
Birth: by 1788, Of Accomack Co., VA. Death: 27 Mar 1836, Accomack Co., VA
His Parents: William EWELL Sr. (Abt 1705-1791) and Peggy --) (Abt 1707-1791)
Spouse (#1): Sarah "Sally" Dickerson Or Dickinson (1788-Abt 1860). Died about Feb 1860 of Accomack Co., VA. Bef 1803
Marriage (1): Sarah "Sally" Dickerson Or Dickinson (1788-Abt 1860) of Accomac Co. VA.(Source: Bill Wilkins Genealogical Database, entered by Paul A. Jensen Friday, 16 May 2003.)
Child born (1-#1): Sally EWELL. 4 Jan 1807 Child born (1-#2): William EWELL (1807-1849). Born in Assawoman, VA. Died in 1849 in New Orleans, LA. 29 Oct 1809 Child born (1-#3): Leah F. EWELL (1809- ) of Accomac Co. VA. Child born (1-#4): Burnetta Penelope EWELL. Child born (1-#5): Serena B. EWELL.3 May 1813
Note: Ejectment Proceedings: Attempt to eject William Ewell from certain Accomack Co. lands.Accomack Co, VA.1 Dec 1818 Partition Suit: vs. children of Teackle Taylor & William L. Lucas re: 59 acre plantation.Chincoteague, Accomack, VA.
Marriage (2): Leah. 1819 Child born (1-#6): Margaret EWELL (1819-1910) of Accomac Co. VA.Died in 1910.Married William Matthews, b. 1803 of Accomac Co., VA.
Spouse (#2): Leah. Born of Accomack Co., VA. 27 Mar 1836 Death: Accomack Co., VA.
General Notes: Source:"Land Causes of Accomack Co., VA 1727-1826" compiled by Stratton Nottingham, Onancock, Virginia, pg. 39.Data entered by Paul A. Jensen 22 Apr 2003.