http://en.wikipedia.org/wiki/Robert_C._Nicholas

Robert Carter Nicholas (1793 – December 24, 1857) was a United States Senator from Louisiana. Born in Hanover, Virginia, he served in the War of 1812 as a captain and major. He attended the College of William and Mary in Williamsburg, Virginia, and moved to Louisiana, where he became a sugar planter in Terrebonne Parish in 1820.

Nicholas was elected as a Jacksonian (later, a Democrat to the U.S. Senate to fill the vacancy caused by the resignation of Senator-elect Charles E.A. Gayarre and served from January 13, 1836, to March 3, 1841. He was Secretary of State of Louisiana from 1843 to 1846, when he resigned; he died in Terrebonne Parish in 1857. Interment was in the Burthe vault, St. Louis Cemetery, New Orleans.

Nicholas was a nephew of John Nicholas, a U.S. Representative and Wilson Cary Nicholas, a U.S. Senator and Representative, both of Virginia.

Robert Nicholas was the son of George Nicholas (1754–1799) and grandson of Robert Carter Nicholas (1728–1780).