His surname is Kok and he is from the Netherlands.
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culture
In Xinjiang Uyghur place names, 阔克 transliterates 'kök' (blue/green) — as in 阔克苏 (Kok-su, 'blue water') and 阔克塔什 (Kok-tash, 'blue stone'). It also serves as a phonetic rendering of Dutch surnames like Kok (e.g. former Dutch PM Wim Kok).