A [[Democratic Party|Democrat]], Broussard was born in Calcasieu Parish, of which [[Lake Charles]] is the principal city, to Dosety Broussard and the former Elvina Lyons. He relocated to Lafayette with his widowed mother in 1870. He was educated in public schools.<ref name=dict>{{cite web|url=https://www.lahistory.org/resources/dictionary-louisiana-biography/dictionary-louisiana-biography-b/|title=Broussard, Isaac A.|publisher=Louisiana Historical Association" ''A Dictionary of Louisiana Biography.''|accessdate=March 12, 2020}}</ref> | A [[Democratic Party|Democrat]], Broussard was born in Calcasieu Parish, of which [[Lake Charles]] is the principal city, to Dosety Broussard and the former Elvina Lyons. He relocated to Lafayette with his widowed mother in 1870. He was educated in public schools.<ref name=dict>{{cite web|url=https://www.lahistory.org/resources/dictionary-louisiana-biography/dictionary-louisiana-biography-b/|title=Broussard, Isaac A.|publisher=Louisiana Historical Association" ''A Dictionary of Louisiana Biography.''|accessdate=March 12, 2020}}</ref> |