I do know all the Jereb in Waukegan and North Chicago metro area. I checked Federal Census and find none in rural Lake County west of Hwy 41. Someone told me they used to go to a Jereb farm in the area I specified. I would appreciate it if you would look at the map. If you find nothing then I will relay this information on.
The Waukegan Historical Society said they found no data on Jereb on a rural farm either.
So maybe the person's childhood memory are either wrong of it was a different family they were visiting.
Thank you for your response and looking at the map.