Literature Reference: Yu means light; You means assistance. Source from 'Shuowen Jiezi'.
煜:
Yuming, Yiyu, and Guangyao, all signify brilliance and radiance. When used in names, they represent a luminous and prosperous future, fostering success in one's career and endeavors.
佑: Blessing, Protection, and Safeguard. When used in a name, it signifies heavenly-bestowed fortune and contributes to good health.
Meaning: Shining with light and blessed with protection, symbolizing a bright future.