Literature Reference: 昕，明也。——《说文》；瑜，美玉也。——《说文》 Xin means dawn, brightness. Yu means beautiful jade. Source from 'Shuowen Jiezi'.
昕: The moment when the sun is about to rise. When used in names, it often symbolizes brightness and wisdom.
瑜:
The radiance of jade, auspiciousness and well-being, grace and composure.
Meaning: Xin symbolizes the dawn and brightness, while Yu represents precious and beautiful jade.