Shalini: Ettrick is in Scotland. Not far from Yarrow. "The Dowie Dens O' Yarrow" is another famous Scottish ballad.

I've never heard of the song "Ettrick," but then, I don't know everything. Ettrick is on the Scottish/English border, so it could be one of those songs about the battle of Flodden, where the cream of Scottish nobility, including King James the 4th, met their deaths in a battle against the English in 1513. The song "Flooers O' The Forest" (Flowers of The Forest) is a lament about the occasion.

Google "Ettrick" and you'll get more info.