I'm holding thumbs for your and Rene's explanations.
During the Second World War there was a very right-wing, white-supremacist politician here in South Africa (Eric Louw) who named his son Izan; in his case it was Nazi, written backwards and pronounced eeZAHN. The son grew up with similar political views but with a far lower public profile than his father, who was a Cabinet minister in the late 1950s, early 1960s.
I can't imagine that anyone in Spain would be aware of that derivation or influenced by it!