Yarrow is a place and parish in the Scottish Borders area of Scotland and in the former county of Selkirkshire.The name "Yarrow" may derive from the Celtic word garw meaning "rough" or possibly share a derivation with the English name "Jarrow".

[6] However, the glebe remained on the north side of the loch, the same that was attached to St Mary's Chapel, now eight miles to the west of the kirk to which it belonged.

The shape was very irregular and, although the population was low (1,264 in 1841), it was difficult for the minister of the parish to reach many of them, both as regards distance and the want of roads and bridges.

The duke proposed to make over the chapel at Ettrickbridge, which he had built in 1839, to be the church of the new parish, to erect a suitable manse for the minister, and to bear the expense of the judicial separation proceedings.

The remaining portion of the parish of Yarrow would contain a population of about 670, extending in length to about 19 miles, and in breadth.