Robert was the brother of Thomas and of James who, both in turn, were lairds of the Isle. He chose a scholastic career at Edinburgh, taking the degree A.M. and later is recorded as having been appointed a Regent (professor) of Philosophy. On September 2, 1681, he married Helene, a daughter of James Pillans who was also a Regent of Philosophy. They had two sons, Thomas and James.

Source: Robert Halliday Lidderdale, An Account of the Lowland Scots Family of Lidderdale, 1950.

Register of Marriages of the City of Edinburgh, 1595-1700
Old Kirk Parish.
County: Midlothia
Country: Scotland
Lidderdale (Lidderdaill), Mr. Robert; Helen Pilan 02 Jun 1681.
Source: www.ancestry.co.uk

Roll of Edinburgh Burgesses, 1406-1700.
County: Midlothia
Country: Scotland
Volume 5. The Register of Marriages.
Errata.
Lidderdaill, Mr. Robert, B. and G., "regent of Philosophie in the Colledge of Edr. be r. of w. (blank), dr. to James Pillans, lait regent of Philosophie in the sd. Colledge, B. and G.," gratis. by act of C. of 21 Sep 1681 inst. 28 Sep 1681.
Source: www.ancestry.co.uk

The Commissariot Record of Rdinburgh. Register of Testaments. Second Section--1601-1700.
List of Burials excerpted from Register in possession of the Registrar of the Canongate.
The Register--1706-1854.
County: Midlothia
Country: Scotland
Lidderdaill, Mr. Robert, Regent of the College of Edinburgh 05 Jun 1690.
Source: www.ancestry.co.uk