Complex sentence: Maehe Ranginui was the first to establish Matahiwi Marae in 1902, after historically being sighted across the river at Hikurangi alternatively referred to as Poutama, then later Karatia, a name superimposed, as were other place names along the river.
Split into simpler sentences: Maehe Ranginui was the first to establish Matahiwi Marae in 1902. It was historically sited across the river at Hikurangi (alternatively referred to as Poutama), then later Karatia, a name superimposed, as were other place names along the river.