The US Board on Geographic Names will not even accept a name change petition until 5 years has passed since the person passed away. They were outraged when Congressman Gerry Lewis asked them to rename Keeler Needle to Crooks Peak, in the Sierras for Hilda Crooks. They turned him down flat and he got the name change attached to a bill that passed in the U.S. Congress, he held a naming ceremony at the peak (we were on the summit of Crooks Peak looking down at the ceremony 2,500' below) and the USGS has been norky about name changes ever since.
They not only are looking for the time period to elapse, but want the name change of the mountain to be generally accepted in the local area and commonly used by everyone.
We are experiencing all of this and trying to follow their instructions on our committee to rename East Dix to Grace Peak and South Dix to Carson Peak.
Good luck unless you are well organized and do everything the Board expects.