The surname "Yōng" is pronounced as /jʊŋ/ in English. The pronunciation is similar to the word "young" but without the "n" sound at the end. The "y" sound at the beginning is like the "y" in "yes". The "ou" sound is like the "oo" in "book". The final "ng" sound is like the "ng" in "sing". So when you pronounce the surname "Yōng", make sure to enunciate each sound clearly to get the correct pronunciation. ????