I’ve wondered where the Grover design came from. No design happens without history. Either it is a reference to an older design or a rejection of it. I think the Grover is a reference, but I’m not sure what to.

On a recent trip to see family in Fort Worth, I spotted this door on a 1925 house. This was a nice neighborhood in the 20s and 30s, (still is) and the doors tend to be v-groove, not stile and rail. Many of the doors have geometrically designed inset windows. This one has a veneer and design similar to the Grover with craftsman style sills under each window.
Somewhere between this design and the Grover is the Great Depression and World War II.