Where does “las” come from?

las (Polabian) comes from Middle Low German las, from Old Saxon lahs, from Proto-Germanic lahsaz, from Chinese 拉薩, from Tibetan ལྷ་ས, from Old Tibetan ར་ས.

las (Polabian): salmon

Definitions

salmon

Ancestry of “las”, step by step

Step	Language	Word	Meaning
1	Middle Low German	las	patch, scrap; tired, dull; salmon
2	Old Saxon	lahs	—
3	Proto-Germanic	lahsaz	salmon
4	Chinese	拉薩	—
5	Tibetan	ལྷ་ས	Lhasa
6	Old Tibetan	ར་ས	—

Every word from Old Tibetan ར་ས →Every word from Tibetan ལྷ་ས →Every word from Chinese 拉薩 →