Answer
Claudia Octavia was Claudius's daughter from his first marriage to Plautia Urgulanilla. She was born in 39 AD and was the only surviving child of their marriage. After her mother was executed in 41 AD, Claudia Octavia was brought up by her father and his second wife, Valeria Messalina. In 48 AD, Claudius divorced Messalina and married his niece Agrippina the Younger.