Why Was the Slave Named "Lucky?"

Williams, Martin, Abraham, Irwin as "Lucky"

In the fall of 1988, our son and I went to Lincoln Center to see a revival of "Waiting for Godot."

Robin Williams and Steve Martin were quite fine in the two lead roles, and F. Murray Abraham was properly domineering as Pozzo, leading his abject slave, Lucky, played by the master kinetic actor, Bill Irwin. 

I was thinking of that master-slave relationship Friday night when The New York Times broke the story that the FBI had begun an investigation in early 2017 of the apparent master-slave relationship between Putin and Trump.
www.nytimes.com/2019/01/11/us/politics/fbi-trump-russia-inquiry.html

In the real-life version, Lucky snarls and yaps at just about everybody else, but when Pozzo fixes his Lubyanka-basement glare at him, Lucky rolls on the floor and whimpers. 

How did poor Lucky come to be led around on a leash? Beckett does not say. I am hoping this will soon be explained to us by Robert S. Mueller, III.

Lucky, left. Pozzo, right.