Ung in Chinese / Japanese...

翁 is the name Ung in Chinese (Mandarin).

ウン is the name Ung in Japanese Katakana.

Note: Because this title is entirely Japanese Katakana, it should be written by a Japanese calligrapher.

This is the surname Ng in Chinese.

吳 is sometimes romanized as Ang, Eng, Ing and Ong in the United States and Ung in Australia. In Mandarin, 吳 is usually romanized as Wu, but sometimes Woo. In Vietnamese, 吳 can be the Ngô surname.

Be careful, as 黃/黄 is another surname character that also romanizes as Ng and other variants noted above.

功夫散手 is a martial arts title.

Oddly, there are multiple ways two spell/romanize this in English, but in Chinese, it's written exactly the same.

Technically, the Mandarin romanizes as “gong fu san shou,” for which you'll sometimes see it written “kung fu san shou” (k'ung is an old romanization for a word that sounds like gong with a vowel sound like “oh”).

There is another martial arts style that spells this “Kung Fu San Soo.” I guess this was supposed to approximate Cantonese pronunciation for which the scholarly romanization is generally agreed to be “gung fu saan sau.”