NOTES: See "Doubts About the Finley Line." My brother Josh points out there is no substantial evidence disputing the Finley family's own recognition of James McGrew as the husband of Mary Finley (i.e., it is not the conventional situation of the less established line claiming a dubious but convenient kinship), so this site will resolve the issue that way unless and until more solid evidence calls that into question.
Josh's notes and quotes from "Clan Finley": Janet Hay was the daughter of John Hay of Errol, Perthshire, and Janet Douglas. Janet Douglas was the daughter of James Douglas ("dark glass" - the family probably originated near a tarn). This is all we know at present about the Hays and Douglases.