Literature Reference: 恺者，乐也；恬者，安也。—— 《说文解字》 Kai means joy; Tian means peace. Source from 'Shuowen Jiezi'.
恺: Happiness, harmony; triumph.
恬: Tranquil and graceful, it often conveys a sense of approachability and gentle charm in names.
Meaning: Kai Tian signifies joy and peace, embodying a tranquil and happy life.