a city in northwestern England
"After visiting the historic cathedral, we drove south from Lancaster toward the coast."
the English royal house that reigned from 1399 to 1461; its emblem was a red rose
"The Lancastrian king wore a badge of a red rose on his helmet during the Hundred Years' War."
A habitational surname, from Old English​.
"The Lancaster family has lived in that village for generations, a name derived directly from the local town."
The word comes from a place named after a Roman fort built on the River Lune. The second part of the name is derived from an Old English term meaning "town," which appears in many other English place names today.