I recently discovered indexes of Scotland Births and Scotland Marriages at FamilySearch.org, and have extended my matrilineal line by a couple more generations.
b) My mother (still living) married Charles McAlpin Pyle, Jr.
c) Helen Lysle Hunter (1907 - 1990) married Lowell Townsend Copeland
d) Marguerite Lysle (1876 - 1967) married Percy Earle Hunter
e) Marion Helen Alston (1850 - 1885) married George Lysle, Jr.
f) Lillias Johnston (4 June 1806, Lesmahagow, Lanarkshire, Scotland - 3 Jan 1852, Allegheny, Pennsylvania) married John Alston on 28 June 1833, Glasgow, Lanarkshire, Scotland.
g) Lilias Kennedy (27 December 1775, Douglas, Lanarkshire, Scotland - ????) married Robert Johnston, 22 November 1801, in either Douglas or Carmichael, Lanarkshire, Scotland.
h) Jean Grienshields [Greenshields] is listed as the mother on the index of the birth of Lilias Kennedy.
Going back thousands of years in the "maternal tree" (what FamilyTree DNA calls the "deep ancestral origin"), my branch's migration was from western Asia to northern Europe. When I look at my mtDNA matches in FTDNA, they are primarily in Norway, England, Scotland, and Germany.
For a more thorough explanation of using DNA in genealogy, I recommend the blog, Your Genetic Genealogist, written by Cece Moore. Also, The Legal Genealogist, Judy G. Russell, wrote weekly posts about DNA last year, many of which explain DNA very well.