Why is Mojave spelled with an “h” in Arizona and with a “j” in California?

Let us start at the beginning: Mohave is an attempt to spell or pronounce the true name of the Native American tribe called the Mojave. It’s Pipa Aha Macave, “people who live along the water.” Today, the Fort Mojave Indian Reservation, based in Needles, covers about 32,000 acres in California, Arizona and Nevada.