Kay: It means joy and harmony.
"Shuo Wen Jie Zi" explains the cloud: Kang Ye. From the heart, yes, yes.
Xin: It means when the sun is about to rise. It symbolizes hope and light.
"Shuo Wen Jie Zi" explains that once it is clear, the sky will come out. From the sounds of the day. Read like a stone.
"Open" means happiness, harmony and happiness; Heart means dawn, light and heart, which means beauty.
The meaning of the name can be interpreted as: "Happy? Bright. "