Baltimore County
Baltimore City
Charles Street, Calvert Street
Calvert County
Calvert Cliffs, St. Leonard
Cecil County
Cecil Avenue, Cecil Elementary School
Charles County
Frederick County
Leonardtown, Maryland
Harford County
Cumberland, Maryland: Baltimore Street & Baltimore Avenue
Bladensburg: The Baltimore Road
Maryland State flag - has Calvert-Crossland family / Lord Baltimore coats-of-arms and shield on it
Source: https://en.wikipedia.org/wiki/Baron_Baltimore