Without any dates or approximate dates of birth/marriage/death or names of parents, spouses, children, siblings etc. it's difficult for anyone to help.
Try familysearch.org: Example below lists some references for Howard A Pierce in the correct location.
Howard A Pierce
US Census, 1900 birth: Aug 1837 Maine
residence: 1900 ED 85 Ward 9 Slidell town, St. Tammany, LA
spouse: Mandane Pierce
children: Mandane Baringer, Bertha N Pierce
Howard A. Pierce
marriage: 21 Mar 1906 St. Tammany, LA
spouse: Mattie Guy
marriage: 10 Sep 1904 St. Taammany, LA
spouse: Louise Jones