Marriage to: Duvall, Manley, Waters, Baltzell

I beleive there is a marriage connection or connections involving my Lefever family of Frederik Co., Maryland late 1700's to early 1800's.
A Nimrod Duvall & wife Rebecca Waters were neighbors in Ohio of Jacob Lefever born 1785 and wife Mary Pope Jackson who apparently joined them. Both jacob and Mary were born and married in Frederick (m 1804). She was the daughter of Henry Jackson and wife Rebecca Pope of Frederick. Jacob was raised by "his uncle, Major Baltzell".
When Jacob's father Elias Lefever of Frederick died 1803, Jacob and his sibling heirs sold Resurvey of Bennetts Resolution to Baker Johnson. He and six brothers & a sister selected Samuel Duvall to evaluate this land for sale. Since a descendant of Elias married later in Ohio a Sarah Duvall, daughter of the above Nimrod Duvall, I believe that Samuel Duvall was related to the above Elias Lefever born 1743.
One son of Elias, John Lefever, married Catherine Martz May 12,1800 and in 1813 was in a Lutheren church in Huntingdon Co. PA with a George Manley & Charlote Manly & other Manly (Rebecca?).
Sarah was much used by Duvalls. DeVal was an alternate spelling & some Duvall had consorts named Sarah: Rebecca seems to run in Lefever kin & consorts.
In Anne Arundle Co., Walter Duvall married Sarah Duvall 1798; Mark Brown married Sarah Duvall 1793; Rachell Duvall married Wm. Waters in 1724; Charles Duvall married Rebecca Beckett 1764.
In Frederick Co., Benj. Duvall married Rebecca Ijams
1803 (offspring married Manley?); Mareen H. Duvall married Hannah Price 1801 (several years earlier a female Lefever cousin of Jacob maried Price); SARAH DUVALL married PLUMMER IJAMS 1794.
Prince Georges Co.: Mareen Duvall married 1780 Mary Duvall; Sarah Duvall married 1733 Jas. Beck (80 years later in Ohio Sarah Lefever married a Beck.
Offspring of Plummer Ijams & Sarah Duvall (possibly another Ijams) married several Manley.
No one can find the origins of this NIMROD DUVALL born 1776-7 or wife REBECCA WATERS.We wonder if he was an out of wedlock son, or he assumed the name Nimrod. In 1803 in Ohio he was the guardian of a Charles Sipe (Sype or Sypes or Seip). Any help or suggestions appreciated. Will share information.