ちょっと調べてみたが、ディヨン・ユンが平壌に住んでいるみたいだぞ。

In 1971 he became a German citizen. He died in Nov 1995. (Source: Yun I-sang.)
Yun's widow, Lee Soo-ja, is living in Pyongyang, North Korea, together with their daughter Djong, 55.
ttp://www.kalaniosullivan.com/OsanAB/OsanSongtanKorea2006.html