In trademark law is kind of crappy, but you usually can’t hold universal trademark across all markets. Trademarks exist to protect consumers and companies from instances of confusion with the trademarked name, or to prevent unlicensed marketability of someone’s trademark in an unrelated product.
For example, someone could name an extermination company Dead Mouse because there is no way anyone would reasonably believe Deadmau5 is coming to their door to deal with a rodent infestation. Deamau5 would not have any reasonable claims that his brand was damaged or that he lost out on money as this is not a market he operates in.
The fuzzy land of trademark law comes in if say, Kellogs made a cereal called “Dead Mouse”. Obviously they couldn’t call it “Deadmau5” but they’re probably trying to ape on his brand recognition even without his unique spelling. As celebrities take cereal brand deals all the time, it could lead to consumer confusion, etc.
Long story short, Zidane is a common enough sounding name which is, to my knowledge, not a well known artist in the music market that I don’t think confusion would realistically happen with the soccer player.
