Elizabeth Knorr
From Tardis Wiki, the free Doctor Who reference
Elizabeth Knorr was a human mother.
From 1932 to 1940, many children went missing in the United States. They were kidnapped by Odd Bob the clown. The kidnappings were documented in an article by Francis Lincoln.
Elizabeth's daughter Barbara was among the kidnapped children. Elizabeth made a plea that everyone who knew information about Barbara's whereabouts should get in contact with her. She also warned other parents that this could happen to them too. (TV: The Day of the Clown)