We've been told that Eurodam's name was selected as the winner of a 'contest'. That's as good an explanation as any other.
Thankfully, her sister which is now under construction at Fincantier Shipyard near Venice, will have a more traditional name like the rest of the fleet. She will be named Nieuw Amsterdam. (I think she is the fourth ship in HAL's history to be named that so will be Nieuw Amsterdam IV if, indeed, she is the fourth.)