My cousin in Sweden (in Umeå) is named Göran, and my Swedish cousins pronounce the name as YORN, with a rolled R (as all Rs are in Swedish, apparently no rolling Rs is the most obvious sign of a heavy accent in Sweden). That's just one syllable - contracted I guess - and round your lips when you say Swedish vowels, such as the Ö.
If Göran is pronounced as Yorn with just one syllable, it must be the local dialect. Göran is usually pronounced with two syllables. I should know, it is a very common name in Sweden and I've met many Görans.