Complex sentence: Jacques de Rougé, marquis du Plessis-Belliere since 1651, married Suzanne de Bruc de Monplaisir, known as the Marquise du Plessis-Bellière.
Split into simpler sentences: Jacques de Rougé was marquis du Plessis-Belliere since 1651. He married Suzanne de Bruc de Monplaisir, known as the Marquise du Plessis-Bellière.