My maternal grandfather's father, William Hyndman Nelson (b. 1897), came to the US with his parents from Scotland in the early 1900s. I can find them in the US Census as Moses and Margratte Nelson. Tracking down their parents was a goal of my grandfather and he had some detailed notes.
The marriage for Moses' parents Moses and Jane McFadden/McFadyen was found in Tullylish, Banbridge, County Down, Ireland (now Northern Ireland). The younger Moses was born in Partick, Lanarkshire (Country of Lanark), Scotland while his son William was born in Johnstone, Renfrewshire (County of Renfrew).
I know that Willam's mother was Margaret Hyndman born circa 1872 (in the 1910 US census she is listed as 37 years). There is a birth record of a Margaret Hyndman, born 8 January 1872 in Cathcart, Renfrew, daughter of John Hyndman and Margaret Henderson. There is a church record of Moses marrying Margaret Hyndman daughter of Andrew Hyndman and Margaret McGaffin/McGoffin.
Any help in this matter would mean a great deal to myself and my grandfather's ghost will rest easy.