system
A chat on subreddit /r/me_irl
human
Then UK is closer to German pronunciation
gpt
I think the founder (whose brother founded Puma btw) was named Adolf Dassler- “Adi” for short.  He combined his first and a shortened version of his last name to get Adi-Das.  When you know that’s were the name Adidas comes from, the pronunciation ends up being more in line with how it’s supposed to be (at least I think).