Complex sentence: The first resident in the vicinity of the lake was Matthew Scouten, who arrived in the early 1790s, but the first settlers were the Worthingtons, who arrived in 1806.
Split into simpler sentences: The first resident in the vicinity of the lake was Matthew Scouten, who arrived in the early 1790s. However, the first settlers were the Worthingtons, who arrived in 1806.