I would never leave my dogs unattended with a child, one lick from their huge tongue could drown a child.
Actually the biggest problem with our Wolfhounds literally is their size and weight, if they bumped or knocked a child or and older person they would knock them over, if they stand on your foot it bloody hurts, as for aggression lol, I don't think I would worry for a second. I have never heard of an aggressive wolfhound let alone heard of one attacking anybody. Probably the worst guard dog you could own, they would welcome anybody, However, they would certainly defend myself or Carakeel with their life if they were really pushed.