Where does “รุ่งโรจน์” come from?

รุ่งโรจน์ (Thai) comes from Thai รุ่ง, from Proto-Tai roŋᴮ — bright; light.

รุ่งโรจน์ (Thai): alight; blazing; brilliant; sparkling;...

Definitions

รุ่งโรจน์ traces back through two separate lines of ancestry.

Step	Language	Word	Meaning
1	Thai	รุ่ง	dawning; breaking; starting; bright; successful;...
2	Proto-Tai	roŋᴮ	bright; light

Step	Language	Word	Meaning
1	Thai	โรจน์	bright; brilliant; glorious; flourishing
2	Sanskrit	रोचन	enlightening, illuminating, irradiating; bright,...