I dug through my material on Patterson Crocket and family info I put together for Bruce back in 2012. Here is a entry that sheds a bit of light on the family relations. "Pat" and his brother David were arrested and tried with their cousins James and Thomas Vickers in Bates county, likely recruiting.

Subject: Re: [CROCKETT] Patterson Crockett
Date: Fri, 6 May 2005 09:19:37 -0500
References:
Joy and Elizabeth,

I found a reference to Patterson as a brother of David (Davy) Crockett in
the "Pictoral and genealogical record of Green County, Missouri"
(http://thelibrary.springfield.missouri.org/lochist/history/pictorial/gray.html).
It is in the biography of Dr. Thomas J. Gray, who was a brother of Nancy
Gray, Patterson's wife. It states "Nancy, wife of Patterson Crockett, a
brother of the famous David Crockett." Elizabeth mentioned the letter
written by Nancy Willingham [aka Nancy J. Crockett, daughter of Robert G. and Mary Crockett] to Susan and Jane Crockett [aka Susan and Jane Love. Susan and Jane and married James P. and John L. Crockett, respectively, and were thus sisters-in-law to Nancy J. (Crockett) Willingham] in her email. Nancy
Willingham was a sister of the Patterson Crockett [aka John Patterson Crockett, 1835-1863] killed by Yankee militia
in 1863. Unfortunately, it appears that this and another letter written to
James Love [father of Susan and Jane (Love) Crockett) concerning Patterson's death were destroyed by family members who
did not realize their value to later generations; thank goodness one of our
cousins had the foresight to copy a few of them. This Patterson Crockett's
full name was James Patterson Crockett, but he went by the name of "Pat" as
evidenced in one of the letters written describing his death during the
Civil War. Susan and Jane Crockett were daughters of James Love and Matilda
(Scholl) Love. Susan was married to the James Patterson Crockett killed in
1863 and Jane was married to James Patterson's brother John, who was killed
in the same fight that led to James Patterson's demise. [I believe this last reference is a mis-type. David B. Crockett, another younger brother of James, is the one believed to have died in the same Civil War skirmish as James in the spring of 1863. John L. Crockett appears to have survived the Civil War based on census records and other Ancestry.com trees. - Don Campton (Nov. 23, 2012). James Patterson
Crockett's father was Robert G. Crockett, the son of the Nancy Gray and
Patterson Crockett mentioned above. Robert G. Crockett had 4 sons - James
Patterson, John, David, and Robert. It appears that John was the only
brother that survived the Civil War in western Missouri. [It appears that Robert died before 1860 and would not have been a Civil War casualty, if true] I have done some
research on James Patterson's death and his role in the Civil War in western
Missouri (Cedar, St. Clair, and surrounding counties). If anyone on the
Crockett list has information on this family and their participation in the
war I would love to hear it, and share what I have.

Tim Fulbright