Allegheny County, Pennsylvania
Allegheny County was officially created on September 24, 1788, from parts of Washington and Westmoreland counties. The word Allegheny is of Lenape origin, with uncertain meaning. It is usually said to mean ‘fine river’, but sometimes said to refer to an ancient mythical tribe called ‘Allegewi’ that lived along the river before being destroyed by the Lenape. The area developed...
