There are 6,252 with the Preston surname listed at WikiTree
Swope has 919, Utterback 530, Sweeney 3,400, McCurdy 1,435, Hess 5,431 and Hemry 83.
If you click on Find at the top right of the page, it will open a menu that includes Surnames. If you have first names to go with the surnames and a birth year, that would help narrow the search.
You can post questions too.