William Astor III was an American businessman and member of the prominent Astor family. Born in 1829, he was the grandson of John Jacob Astor, one of the wealthiest men in early American history. William Astor III managed the family’s real estate investments and was involved in various business ventures during the 19th century. He is best known for his role in the development of New York City and for his contributions to the family’s wealth. William Astor III passed away in 1892, leaving behind a legacy tied to the Astor name and its influence in American society.