Ibiza's key location between Africa and ancient Iberia made it a convenient stopover for Mediterranean seafarers, such as the Phoenician traders, who called the island Ibosim.
Ibiza is between Africa and Iberia.
In The Dark Side of Camelot , of course, Hersh found four ex-agents who told him about JFK's reckless sexual escapades and about how they were pressed into providing cover.