Ron Booe here.
Your name stayed the same because of when your family came to the new land. My line came in 1680s/1700s when king George was over the land. I have my line back to 1300s with help from German Gov help.
Just a note to help, the Bub name between 1500s and 1400s was BUOB. SO the name was BUOB before it was BUB.
THanks
Ron