This character name combines yun 雲 "cloud, clouds" and jiang 將 "military commander, general officer; (Chinese chess) general corresponding to (chess) king". English translators of the Zhuangzi have rendered Yun Jiang and Hong Meng as:
Yun Jiang and Hong Meng are both character names derived from Chinese characters that combine the meanings of cloud, clouds, and general/military commander or king.