Not me, but my son slept with a doll we called "Cathy". One day we hosted the daughter of one of my parent's friends who was visiting San Jose State before deciding on a college. She was named "Kathy" as well. She stayed with us for a few days, then we drove her to the train to go home. We were standing on the platform watching her get on the train when my son started screaming and crying "Cassie" (his version of Cathy). "Don't go!" he kept crying and trying to climb down from my arms. I'm sure people around us thought we were taking him from his mother. It was a wonder no one called the police!
Once he was home and saw his doll on his bed he was OK. Whew!