Cousins
Barneys cousin was Virgil. Andy was also his cousin. They only mention that a few time.
Thelma Lou was the name of Barney's girlfriend.
After The Andy Griffith Show had run it's course Griffith changed gears. He played attorney Ben Matlock, kind of a bumbler with a bad suit. But of course he always solved the murder and his clients...
35 year old Don Knotts appeared in the second episode, 'The Manhunt' as Andy's cousin and Deputy