User blog comment:Banarama/The origins of the name "Diep.io"/@comment-30123468-20180716123914/@comment-26806340-20180716155119

You can pronounce it however you like — Die-puh was just a tongue-in-cheek parody of those so-called etymologists who just go around saying we're all pronouncing words wrong and point to some ancient German manuscript as reference.