Field: mainly refers to cultivated land and the land of officials related to agriculture.
Explaining the cloud in Shuo Wen Jie Zi: Kerwin Chen. The valley of Shu is full of days and months. Xiang Si exit 10, building system. All fields belong to fields.
Yang: Plant name, deciduous tree; Last name.
"Shuo Wen Jie Zi" explains the cloud: Muye. From the sound of wood.
The meaning of this name can be interpreted as: "Tian Chou? Willow ". The idiom "The sun shines through three leaves".