Sorry Niel, I spelled his name wrong. "I" before "E".
No tune for wife#1 that I know of.
From Wikipedia:
Niel Gow was married twice. His first wife was Margaret Wiseman, and they had five sons and three daughters. His sons William, Andrew (1760), Nathaniel (1763), and John (1764) all followed their father as fiddlers and composers of fiddle music; two of the daughters were Margaret (1759) and Grizel (1761). The youngest son, Daniel (1765), died in infancy; William died in 1791 at age 40, and Andrew died in 1794 at 34. Of Niel's sons, Nathaniel is by far the most well-known and another fine composer of Scottish music, with nearly two hundred tunes to his credit. As a widower, Niel married Margaret Urquhart from Perth in 1768, and they went on to share a happy marriage until she died in 1805, which prompted his composition of one of his most famous tunes: "Niel Gow's Lament for the Death of his Second Wife". Niel died at Inver on 1 March 1807, aged 80.