No, they are not.
Yes, Joanna Kern is Donna De Verona's younger sister. I had the honor of seeing Joanna do a Gymnastic exhibition in Sunnyvale, California. She was an Olympic hopefull.
Henry Kern and Fannie Kern
Kern's ended in 1959.
Kern's was created in 1883.
Peter Edward Kern has written: 'Kern genealogy'
Kern Saxton's birth name is James Kern Saxton.
Andrzej Kern's birth name is Andrzej Piotr Kern.
Casey Kern's birth name is Casey Renee Kern.
Diane Kern's birth name is Diane Sue Kern.
Jamie Kern's birth name is Kern, Jamie Marie.
Rex Kern's birth name is Rex William Kern.
Shelby Kern's birth name is Shelby Nicole Kern.