Where does “eilean” come from?

eilean (Scottish Gaelic) comes from Old Irish ailén, from Old Irish ail, from Proto-Celtic ɸales-, from Proto-Indo-European pelis- — stone; rock, cliff.

eilean (Scottish Gaelic): island

Definitions

island

Ancestry of “eilean”, step by step

Step	Language	Word	Meaning
1	Old Irish	ailén	island
2	Old Irish	ail	third-person singular present indicative conjunct...
3	Proto-Celtic	ɸales-	—
4	Proto-Indo-European	pelis-	stone; rock, cliff

Words derived from “eilean”

frith-eilean
leth-eilean
frith-eileanach

Every word from Proto-Indo-European pelis- →Every word from Proto-Celtic ɸales- →Every word from Old Irish ail →