What does KBE mean after someone's name?

It stands for Knight Commander in The Most Excellent Order of the British Empire. It is one of the highest honors a citiaen of Great Britain can obtain. It is a knighthood and entitles one to use Sir in front of the name. There are five levels in the Order and this one is the second from the top.
It stands for Knight Commander in The Most Excellent Order of the British Empire. It is one of the highest honors a citiaen of Great Britain can obtain. It is a knighthood and entitles one to use Sir in front of the name. There are five levels in the Order and this one is the second from the top.