Andrew Redmond Murray-Prior (1786-1860) was Andrew Murray-Prior’s younger son. He was appointed Accountant General of the Irish Post Office on 8 May 1809. On 17 March 1814, he married Catherine, daughter of Sir John Call of Cornwall and widow of Major-General Henry_MacKinnon who had been killed during one of the major battles of the Napoleonic Wars, the 1812 siege of Ciudad Rodrigo.
Andrew and Catherine had a son (John Lawrence M-P: for more see john-laurence-murray--prior-1810) and four daughters (Catherine, Fanny, Sophia and Emily). Andrew allegedly had an affair with Lady Sarah Butler that resulted in an illegitimate child.

Other references: Norfolk Cronicle, 15 February 1806 [not seen; need to subscribe to see]; Burke's Landed Gentry p.1076.