I don't know if this could be your family and I don't have a lot about them, but here's what I do have:
J.W. TIGERT (c/b your James William?), born 24 Aug 1862; died 26 April 1887; no wife listed.Buried at Mt. Moriah Cemetery, Omaha, Morris Co, TX.No children listed.He was my 2nd cousin, twice removed.His parents were John TIGERT (1835-1906) and Charity M. UNKNOWN ((1835-1912), both buried at Mt. Moriah Cemetery.[Had a brother James O. TIGERT and perhaps there wouldn't have been two brothers named James; on the other hand, I have another line that has two brothers named William with different middle initials who were alive at the same time.]
Parents of John TIGERT were William Even TIGERT & Nancy KEITH.William was son of Samuel B. TIGERT & Annie Jane BELL, my 3rd great grandparents.Samuel was b. ca. 1785 in America, possibly in VA.
TIGERT family from Ireland > possibly PA > VA/WV > KY > TN > MS.