Page "Munster, Indiana" Paragraph 6

When Jacob Munster, a young man from the Netherlands who until the 1860s spelled his surname " Monster ," opened an area General Store complete with a U. S. postal station on the back, the local farmers and settlers came to rely on the postal station, which soon became a United States Post Office.

The post office was named Munster, as it was located in Jacob Munster's general store.