Complex sentence: The train is named for a named train of the defunct Pere Marquette Railway, and in turn for Pere Marquette, Michigan (an early name for Ludington), which was named for Father Jacques Marquette, a French explorer of the Great Lakes region.
Split into simpler sentences: The train is named for a named train of the defunct Pere Marquette Railway, and in turn for Pere Marquette, Michigan, an early name for Ludington. The town was named for Father Jacques Marquette, a French explorer of the Great Lakes region.