I had a cat which responded vocally with "mrrr" when hearing his name. Saying the name repeatedly had an 80% chance of summoning my cat, and a 20% chance that he would come running and jumping up into my hug. I loved that cat so much. Smart loving bastard who liked to also chew on my wife's foot on her way to the bathroom at night, and lovingly hump his towel when he was bored.