Stoney Flintstone is Freddy Flintstone's retired non-canon grandfather and a recurring character of two segments, "The Little Visitor" and "Grandpa for Loan", featured in the twenty-third episode of the first season of The Flintstone Kids, a spin-off of the original series, The Flintstones.
Stoney is a tall and stout caveman with fair skin, tan stubbles, thick grey eyebrows, a bald head with three hair strands and two grey tufts of hair. He wears a crimson-red loin cloth with a dark blue bow-tie and a pair of glasses.
- The Flintstone Kids
- He was quite similar to Montague Jetson (also voiced by Howard Morris) from The Jetsons, who was the energetic grandfather of George Jetson.
- This character is considered non-canon because Fred's real grandfather is Rockbottom Flintstone, according to the episode, "The Story of Rocky's Raiders" featured in the sixth and final season of the original series, The Flintstones.