Region
Maryland
3
Pennsylvania
3
United States
2
Connecticut
1
Fayette County (Pa.)
1
Greene County (Pa.)
1
Guyana
1
Maryl
1
Mason-Dixon Line
1
Massachusetts
1
Middle Atlantic
1
Middle Atlantic States
1
New York (State)
1
Ohio River
1
Ohio River Valley
1
Pennsylvania-Virginia boundary dispute
1
Philadelphia (Pa.)
1
Puerto Rico--History
1
Rhode Island
1
Venezuela
1
Washington County (Pa.)
1
Westmoreland County (Pa.)
1