Dudley Alexander Sydney Cosby, later 1st and last Baron Sydney of Leix
(ca 1730 – 17 Jan 1774)
James Latham (ca 1696 – 26 January 1747) pinxit 1745+
Please see #18 on pp 62 and 70 in archive.irishartsreview.com/gpairisartsrevi/pdf/1988/20492050.pdf.bannered.pdf