John Jacob "Jack" Astor IV (July 13, 1864 – April 15, 1912) was an American businessman, real estate developer, investor, writer, lieutenant colonel in the Spanish–American War, and a prominent member of the Astor family.
Astor died in the sinking of RMS Titanic during the early hours of April 15, 1912.[2] Astor was the richest passenger aboard the RMS Titanic and was thought to be among the richest people in the world at that time with a net worth of roughly $87 million when he died (equivalent to $2.3 billion in 2019).
(source : wikipedia)