"[Jimmy] Buffett has given his fans a path to a simulacrum of the island life. In the course of it, he’s gotten very rich. How rich? According to Forbes, in 2016 Mr. Buffett, who has only had one Top 10 song ('Margaritaville' reached No. 8), was worth a reported $550 million. (Bruce Springsteen is worth a mere $460 million, according to that same list.)
He’s so rich that he’s done a 23andMe DNA test with Warren Buffett because in addition to sharing a last name, the mutual ability to sustain such mind-boggling wealth is so otherworldly that it could surely only be the result of the same extremely rare and fortunate genetic mutation.
The test showed no biological relationship, but they stayed friends. Jimmy calls Warren 'Uncle Warren' and Warren, who has been a business mentor to Jimmy, calls him “Cousin Jimmy.” – Taffy Brodesser-Akner, Jimmy Buffett does not live the Jimmy Buffett lifestyle, The New York Times