Complex sentence: Lion Gardiner (1599-1663) founded the first English settlement in the state of New York and his legacy includes Gardiners Island which remains in the family and is the largest privately owned island in the United States.
Split into simpler sentences: Lion Gardiner (1599-1663), an early English settler in the New World, founded the first English settlement in what became the state of New York. His legacy includes Gardiners Island which remains in the family and is the largest privately owned island in the United States.