Cool. As a native Dutch, perhaps you can shed some light. I saw on the video that the pronunciation of the name is more like "Ardee-yun". Is that correct? Also, is it a Dutch word? If so, I'm interested in learning what it means (if anything).
To me it sounded very much like Limburgs dialect (specifically Kerkraads dialect) "adieë wa" (only first part, but sometimes the second part is omitted anyway) [1]
English Wikipedia also has an entry for the company Adyen, btw [2].