I love ancestry and myfamilyinc

EG Where philpot Families lived in the US in 1920
a wonderful resource

Ancestry.com: "Welcome
Find a fact, find a clue. We'll show you how.
The Family Facts archive, with its rich historical information, can tell you everything from the lifespan of your ancestors to the very meaning of your name. Every time you find a fact, we'll tell you what it means. We'll also tell you how to search for more information using the resources at Ancestry."

myfamilyinc - Google Search