Delurking to answer this question. (I didn't see that anyone else had answered it. If so, my apologies.)
Yes, it is Tom Landry.
I'm in Fort Worth, Texas. Grew up watching the Cowboys. You would not believe the number of adults and kids I know (boys and girls) named Landry/Landrie/Landree. All named after Tom.
Also ... the DCC channel on Pluto is so addictive.