Where does “Ben Macdui” come from?

Ben Macdui (English) comes from Scottish Gaelic beinn, from Old Irish benn, from Proto-Celtic bandā, from Proto-Indo-European bn̥dʰéh₂, from Proto-Indo-European bendʰ-, from Proto-Indo-European bʰendʰ- — to bind; bond.

Ancestry of “Ben Macdui”, step by step

Step	Language	Word	Meaning
1	Scottish Gaelic	beinn	mountain, hill; pinnacle; bin
2	Old Irish	benn	peak; pinnacle; mountain
3	Proto-Celtic	bandā	top, peak; horn
4	Proto-Indo-European	bn̥dʰéh₂	—
5	Proto-Indo-European	bendʰ-	pin, point
6	Proto-Indo-European	bʰendʰ-	to bind; bond

Every word from Proto-Indo-European bʰendʰ- →Every word from Proto-Indo-European bendʰ- →Every word from Proto-Indo-European bn̥dʰéh₂ →