Creator
David Michelinie, Todd McFarlane
  
Jack Kirby, Stan Lee
  
In Comics
Web of Spider-Man #18 - The Longest Road
  
The X-Men #4 - The Brotherhood of Evil Mutants
  
Relatives
Carl Brock (father, estranged), Janine Brock (mother, deceased), Mary Brock (sister), Ann Weying (ex-wife, deceased), Symbiotes relatives: Toxin Symbiote (current symbiote, former grandson), Venom Symbiote (former symbiote, grandfather, former brother), Agony, Phage, Riot, Lasher (uncles, former sons), Scorn (sister, former niece), Carnage (father, former son), Scream (aunt, former daughter, deceased), Hybrid (uncle, former son, deceased)
  
Not Available