瀚: Vast and expansive, it often signifies erudition, profound knowledge, and a broad-minded spirit in names. It aids in learning and fostering friendships.

天: The sky, encompassing all things between heaven and earth, when used in a name, often symbolizes grand ambitions and aspirations, as well as a lifetime of unwavering integrity. This character represents the auspiciousness of pure yang and solitary excellence, capable of bestowing the profound utility of great endeavors and significant achievements.