I think kringel or kringle came to us via Scandinavia while all those poppy seeds hail from Eastern and Central Europe. (seitanismymotor.com)
I saw this Estonian kringle about an year ago and as I like bread challenges I knew the time will come to give this beauty a try. (homecookingadventure.com)
Killer kringle (and countless other treats). (bostonmamas.com)