Websites Macs Motor City and Curbside Classic shared information on this 1959 Willys prototype that looks quite a bit like a Ford Falcon station wagon. You can see additional jeep/car prototypes on the CJ-3B Page: https://cj3b.info/Factory/FactoryDesign.html
I’m sure someone else has more info on this Willys Malibu.
Ford developed the Falcon Station Wagon in 1959, so it’s possible that the Malibu and the Falcon were developed completely independently, but it sure looks like one could have influenced the other.
In 1961, this prototype was considered (was an actual vehicle ever built?) with a CJ-5 looking grille:
In 1961, Willys Motors came out with a different prototype wagon, the J-100, with a more familiar face.
However, the original Malibu grill concept wasn’t completely abandoned. In 1966 (Thanks Mike), the luxurious Super Wagoneer was introduced with a grille very similar to the 1959 Malibu prototype (with a small hood bump as a nod to the Wagoneer styling).:
Later, in 1974, AMC Jeep used the same look on the new Jeep Cherokee line.