https://www.geni.com/projects/Sparks-Name-Study/47534
https://www.geni.com/projects/Sparks-Name-Study-United-States/47535
https://www.geni.com/projects/Sparks-Name-Study-Pennsylvania/48083
Sparks Name study for all Sparks in the United States, Pennsylvaniaa, Allegheny Co.