https://en.wikipedia.org/wiki/Antoine_Dubuclet

Antoine Dubuclet (1810 – December 18, 1887) was the Republican state treasurer of Louisiana from 1868 to 1878. Dubuclet was the first person of African descent to hold the office of Louisiana Treasurer.

Dubuclet was born in Iberville Parish, Louisiana. He was the son of Antoine Dubuclet, Sr and Rosale (Belly), both were free blacks; his father was part owner of Cedar Grove, a successful sugar plantation. Upon his father's death Dubuclet took over his father's responsibilities and assisted in managing the plantation which held over 70 slaves.

In the mid-1830s he met and married Claire Pollard, a wealthy free woman of color. This marriage lasted till her death in 1852. His successful management of both his and his wife's properties allowed him to acquire additional properties. By 1860 he was considered the wealthiest free black slave owner in Louisiana.[1][3] In the early 1860s he met and married Mary Ann Walsh. He had nine children with his first wife and three more with his second wife. The Civil War devastated the sugar industry in Louisiana and impoverished Dubuclet along with his fellow planters.