姓우? 우지상?

우[姓] = 禹, 牛, 于, 虞...
지 = 池, 知, 志, 智, 之, 枝, 芝, 芷...
상 = 上, 相, 商, 常, 尙, 祥, 翔, 霜, 湘...

韓國多不多人姓 우 ??
I dont know.
In China, there are not many people with family name 우 (comparing to 陳李張王何). So, l think there are not many in Korea.

우:宇/禹
지:志/智/芝
상:尙/祥/翔

姓우的人都不少