Si Collection, Upper Volume Radical: Water (shuǐ) Entry: 沀 Kangxi stroke count: 8 Page 609, Entry 10 Collection of Rhymes (Jiyun): Pronounced xu. A surname. Correctness Through Comprehension (Zhengzitong): There is no surname 沀 in ancient or modern times; it is likely the character 汿. Using the water radical as a base or the three-dot water radical is the same.