"Jim Lehrer and Kate Lehrer have 3 daughters."
The original poster did not ask if Jonah Lehrer was Jim Lehrer's son, the OP asked if Jonah was *related* to Jim. One of Jim's daughters could have a child Jonah's age (Jonah was born in '81, Jim was married in '60), but that child would not likely be named Lehrer. Jonah could be a nephew or grand-nephew(?), but it is unlikely that he is closely related to Jim, if at all. As of this writing (7/31/12), the info doesn't seem to be out in the public domain.
Yes according to their biographies their parents are Joe and Virginia
No, Jo Dee Messina and Jim Messina are not related.
No Brian Krause has one older brother Patrick Krause
yes NO, Jim Ed Brown is NOT related to T Graham Brown. I personally know both Jim Ed and T Graham.
No
Many people who have the same surname are not related to each other. There are hundreds, probably thousands of people with the Lehrer surname, so Tom and Jonah are probably not related.
The cast of Brian Lehrer Live - 2005 includes: Brian Lehrer as himself
Jim Lehrer's birth name is James Charles Lehrer.
Brian Lehrer was born on 1952-10-05.
Jim Lehrer was born on May 19, 1934.
Jim Lehrer was born on May 19, 1934.
Jim Lehrer had three daughters named Amanda, Lucy, and Jamie.
Jim Lehrer is 77 years old (birthdate: May 19, 1934).
Jim Lehrer Badass Moderator - 2012 was released on: USA: 11 October 2012
Brian Lehrer Live - 2005 was released on: USA: 5 April 2005 (New York City, New York)
he has no political affiliation
Overheard - 2010 Jim Lehrer 2-8 was released on: USA: 1 December 2011