The sourced background on McCain family.

The McCain family is a prominent American naval family.

The McCain family is a prominent American naval family. Its most notable members include Admirals John S. McCain Sr. (1884–1945) and John S. McCain Jr. (1911–1981), who were the first father-and-son pair to achieve four-star admiral rank in the U.S. Navy, and Captain John S. McCain III (1936–2018), who served in the Vietnam War and spent five years as a prisoner of war at the "Hanoi Hilton" from 1967 to 1972.