Robert Sibbald Calderwood FRSE (1864-1960) was a Church of Scotland minister.
He was born in Blysthwood, Glasgow on 2 December 1864 the son of Robert Wilson Calderwood and Mary Sibbald.
He was secretary to a famous minister, Rev Dr George Matheson.
He was chaplain to His Majesty's Prison Edinburgh from 1905 until 1908, when he was called to Cambuslang on 24 June 1908.
He was elected a Fellow of the Royal Society of Edinburgh in 1910 his proposers being David Fowler Lowe, Robert Taylor Skinner and James Haig Ferguson.