This is an odd one, which is part of why it's taken me so long to put it together. The borough of Hokendauqua as we know it today is in Lehigh County. However, this marker - like the original settlement by that name - is in Northampton County, although very close to the border.
This marker located right next to one of the (many, many) markers for the Walking Purchase, which is going to be a ridiculously long blog post. It's taking me forever to collect them all and I might end up skipping some, depending on my mood. This marker is clearly at least somewhat associated with the same thing. I know that in part, the situation is the way that it is because this marker is a plaque, and dates from back when the PHMC was just called the Pennsylvania Historical Commission, so it's a lot older than the standard blue and gold collection and the wording is, shall we say, less politically correct.