My mother was a Leech, a Scotch-Irish family
emanating from Scotland, thence Ireland>MD>PA>Carolina>AL>TN>AL>TN>LA and
perhaps a few other places. They were members of the large clan of
such folk who largely peopled the states south of the Mason Dixon
line. The Leech men (and women for that matter) usually took
Scotch-Irish spouses, and in fact I have yet to find an ancestor who
married outside of that ethnic group.
Here are some of the surnames, most them ancestors or cousins of
one kind or another: