Where does “casan” come from?

casan (Scottish Gaelic) comes from Middle Irish casán, from Middle Irish -án, from Old Irish -án, from Primitive Irish -ᚐᚌᚅᚔ, from Proto-Celtic *-agnos.

casan (Scottish Gaelic): the supporting beam of a house top; path, road,...

Definitions

the supporting beam of a house top; path, road,...

Ancestry of “casan”, step by step

Step	Language	Word	Meaning
1	Middle Irish	casán	path, footpath; fastener or ornament for a cloak
2	Middle Irish	-án	diminutive suffix
3	Old Irish	-án	diminutive suffix
4	Primitive Irish	-ᚐᚌᚅᚔ	diminutive suffix
5	Proto-Celtic	*-agnos	—

Every word from Proto-Celtic *-agnos →Every word from Old Irish -án →Every word from Middle Irish -án →