Where does “lysa” come from?

lysa (Swedish) comes from Old Swedish lysa, from Old Norse lýsa, from Proto-Germanic liuhsijaną, from Proto-Germanic leuhsaz, from Proto-Indo-European lewk-so-, from Proto-Indo-European lewḱ-, from Proto-Indo-European lewk- — bright; to shine; to see.

lysa (Swedish): to shine, shed light, beam; to call out and make...