Where does “lancúh” come from?

lancúh (Old Czech) comes from Middle High German lanne, from Old High German lanna, from Vulgar Latin lanna, from Latin lāmina, from Latin laminam — accusative singular of lāmina.

Ancestry of “lancúh”, step by step

Step	Language	Word	Meaning
1	Middle High German	lanne	chain
2	Old High German	lanna	metal sheet, platelet; chain
3	Vulgar Latin	lanna	—
4	Latin	lāmina	a thin piece or sheet of metal, wood, marble, etc.; a plate, leaf, layer
5	Latin	laminam	accusative singular of lāmina

Every word from Latin laminam →Every word from Latin lāmina →Every word from Vulgar Latin lanna →