Complex sentence: The name means island in the Pont (the river that flows through the village), as the area previously consisted of a small piece of solid ground around St. Mary's church and the old bridge, surrounded by marshland.
Split into simpler sentences: The name means'island in the Pont', named for the river that flows through the village. The first settlement concentrated around a small piece of solid ground near St. Mary's church and the old bridge, surrounded by marshland.