As I look at it further, it hit me that it was Humphrey, the old, with a beard, de Bohun that started the de Bohun line. He was the one who took the name and went with William to England. I don't think Boone came into play for quite some time. I get confused about this. There is very little information.
I have read in various places that a Capt. Robert Boone ( think from Petherton, father was Robert Booe, his father was Marmande or however it is spelled. I don't think the name is spelled correctly. 30 years or more of researching the Boones and they are still a mystery.