I cannot find any reliable historical or scholarly references to a Buddhist monk or scholar named "翔公" (Xiáng Gōng) in Chinese Buddhist history. It is possible this is a less commonly known figure, a pen name, or a misremembered name.
Buddha Speaks the Sutra of Flowing Head Bodhisattva's Unsurpassed Pure Alms-Round (佛說濡首菩薩無上清淨分衛經)