Hi! I like the KLM retro livery, but is does have a typo. The name of the aircraft (registration PH-SAD) is 'Evert van Dijk', on the livery it shows as 'Evert van Duk'. There are no very clear pictures of the original aircraft as far as I can find. But the aircraft was named after KLM captain Evert van Dijk.

0571483.jpg (1024×705)
Info page Fokker F-27-266 Friendship PH-SAD

It indeed is a typo, albiet an amusing one. I think they just didn't look closely enough at the grainy photos.

https://www.airhistory.net/photos/0571483.jpg