After the war, in 1918 Sevier married the former Retta Brooks of Shreveport in northwestern Louisiana. The couple had three children: Carolyn S. Yerger, who married Rufus Taft Yerger, Sr. ; Roberta Sevier Gandy, who married Robert Wyly Gandy, Jr., and Henry Clay Sevier, Jr., who became an attorney and a partner in his father's law firm for a time. He later moved to Covington in St. Tammany Parish.
Graduate school and career
Sevier and his wife went to New York City, where he completed postgraduate work at Columbia University in 1921. He graduated from the Louisiana State University Law Center, and they settled in Tallulah. There Sevier entered into practice with Jefferson B. Snyder of Tallulah, the political boss of the delta parishes in northeastern Louisiana. Snyder wielded power for more than 40 years as the regional district attorney, from 1904 to 1948. Sevier decided to enter politics. A member of the Democratic Party, in 1936 Sevier was elected to the Louisiana House from Madison Parish to succeed fellow Democrat, Mason Spencer of Tallulah. Spencer was the husband of his Sevier cousin, Rosa Vertner Sevier Spencer. Sevier was elected a few months after the assassination of Governor Huey Pierce Long, Jr.. At the time, there was much voter sympathy for the pro-Long faction. The staunchly anti-Long Mason Spencer had earlier announced that he would run for governor, but he withdrew before the election. Richard Leche of New Orleans, the choice of the Long faction, won the election uncontested. After his law partner Snyder died in 1951, Sevier formed the Sevier, Yerger, and Sevier law firm in Tallulah. The senior Sevier was also president of the Tallulah State Bank and Trust Company. Given these additional responsibilities, and having served eight terms in the state house, he chose not to run again after his term ending in 1952. Like Snyder, Sevier was active in the Democratic State Central Committee. He was the national committeeman during the first administration of Governor Jimmie Davis. Afterward he was selected as the state Democratic Party chairman under Governor Earl Kemp Long. He belonged to the Presbyterian church with his wife. He was affiliated with the 6th Judicial District Bar Association, Rotary International, and the Masonic lodge. Sevier died in 1974 in Mercy Hospital in Vicksburg, Mississippi. Along with many Sevier family members, Sevier and his wife are interred at Silver Cross Cemetery in Tallulah.