Where did marlboro cigarette name come from?

Answer 1

Most likely from Upper Marlboro which happens to be the county seat of Prince's County Maryland near the Chesapeake. It was established as a port town where the surrounding areas were dominated by farms, many of which raised tobacco. http://en.wikipedia.org/wiki/Upper_Marlboro,_Maryland

Answer 2

The township is named for the prevalence of marl, which was first discovered in the area in 1768. The township's name was originally Marlborough, and then shortened. Marl is lime rich mud that is used to make fertilizer.

Answer 3

They were produced on the Marlborough street, so that's it.