Found the following on the internet, possibly Josiah is a relation:
>From "HISTORY OF THE UPPER OHIO VALLEY," Vol. I, pages 735-736.
Brant & Fuller, 1890.
HON. JOSIAH SINCLAIR
Hon. Josiah Sinclair was born in Monroe county, Ohio, March 7, 1843.
He is known in political circles, having been a member of the West
Virginia legislature for several terms. His father, John Sinclair,
was a noted lawyer of Woodsfield, Ohio, at which place the subject of
our sketch received his education, attending the public schools, and
subsequently the high school until he reached the age of seventeen
years. For a time he was employed as a clerk in the county offices,
and later as a clerk in the general freight office of the O. C. R. R.
company, at Columbus. Leaving Columbus, Mr. Sinclair went to
Rosemond, Ill., where for a time he was a clerk in a general store.
Returning to Woodsfield, he enlisted June 19, 1863, in the army, and
at the organization of his company, August 11, 1863, he was elected
second lieutenant, Company F, One Hundred and Twenty-ninth Ohio
volunteer infantry. He served with his regiment in Kentucky and east
Tennessee, under Gen. Burnsides, and was mustered out March 5, 1864.
After the war he studied law in Woodsfield, and was admitted to
practice at the September term of court in 1866. Subsequently he
entered the employ of Laughlin Brothers of Wheeling, and later became
connected with R. E. Sellers & Co., of Pittsburgh. In 1871 Mr.
Sinclair became a member of the firm of Smiths, Sinclair & Co., of
Wheeling, and afterward of the firm of Howell, Paull & Sinclair, of
Wheeling, and afterward of the firm of Howell, Paull & Sinclair, of
the same city. In 1878 he came to Benwood and engaged in the retail
drug business. Mr. Sinclair was elected to the legislature in 1880,
and was re-elected in 1886. During the term of his office he
introduced several important bills, and took part in the debates of
the house. His parents were John and Mary A. (Adams) Sinclair, who
were married, April 15, 1831, in Belmont county, Ohio. The father
was born, September 29, 1804, in the county of Armagh, Ireland; the
mother was born, December 25, 1815, at Waynesburg, Penn. They had
four sons in the service of the government during the late war.
Alexander was a lieutenant in the Twenty-fifth Ohio infantry, and was
killed at Chancellorsville; William was a graduate of West Point, and
was colonel of the Sixth Pennsylvania reserves, and also assistant
inspector-general; Francis was a lieutenant of the Twenty-fifth Ohio
infantry, served in the One Hundred and Seventy-seventh regiment, and
died in the service. William Sinclair, the grandparent, was born in
Ireland. The great-grandfather, John Sinclair, was born in Scotland.
The maternal grandparents were Francis and Jane Adams, who were born
in Ireland, and came to this country later in life.
Prominent Men of West Virginia.
[p.493] JOSIAH SINCLAIR.
page 494
JOSIAH SINCLAIR was born in Monroe county, Ohio, March 7, 1843. His father, John
Sinclair, was an attorney at law, and for a number of years practiced at Woodsfield, Ohio,
where the subject of this sketch was educated in the common and High School. In 1861 he
was clerk in the office of the County Auditor, and then in the general freight office of the
Central Ohio Railroad Company at Columbus. In 1862 he was clerk in a general store at
Rosemond, Illinois, but in the spring of 1863, returned and in the following June enlisted in
the army. At the organization he was commissioned Second Lieutenant of Company F, One
Hundred and Twenty-ninth Ohio Volunteer Infantry. August 13, 1863, his regiment left
Camp Cleveland for the front, and until March, 1864, he was in active service under
General Burnside, Second Brigade, Third Division, Ninth Army Corps, in Kentucky and
East Tennessee. He was at the capture of Cumberland Gap, and with his regiment in several
minor engagements; was detailed to act as Post Commissary, but declined, preferring duty
with his company and regiment. He was the youngest of four brothers commissioned as
army officers. His elder brother, Alexander, Lieutenant, commanding Company K,
Twenty-fifth Ohio Volunteer Infantry, was killed in the battle of Chancellorsville; his second
brother, William, a graduate of West Point, Major Second United States Artillery, during
the war Colonel Sixth Regiment, Pennsylvania Reserves, and Assistant Inspector General,
Thirteenth Army Corps, was promoted for gallant and meritorious services in the siege of
Yorktown, and for like services in the battle of Fredericksburg; his third brother, Francis
M., Lieutenant, Company C, Twenty-fifth Ohio Volunteer Infantry, and later a member of
the One Hundred and seventy-seventh Ohio Volunteer Infantry, died in the service. After
Josiah's term of service in the army, he returned to his home and entered upon the study of
the law. At intervals he clerked in the office of his uncle, W. T. Sinclair, Probate Judge, and
in the office of the Clerk of the Court of Common Pleas. In September, 1866, he was
admitted to practice. In November, of the same year, he entered the employ of Laughlin,
Smith & Co., wholesale druggists, of Wheeling, as a commercial traveler, intending, at the
expiration of one or two years, to [p.494] return to his profession; but a year and a half later
he entered the employ of R. E. Sellers & Co., wholesale druggists, of Pittsburgh,
Pennsylvania, and two years later returned to Wheeling, and associated in business with
John L. and George A. Smith, under the firm name of Smiths, Sinclair & Co., wholesale
druggists. Later he became a member of the firm of Howell, Paull & Sinclair, wholesale
dealers in teas and tobaccos, and in March, 1878, removed to Benwood, Marshall county,
to engage in the drug business.
WANDA SINCLAIR
Rexdale, Ontario