Yes, there is a well-known mythological figure from Greek mythology named Oedipus who unknowingly married his mother. In terms of the available information, Oedipus was the king of Thebes and he committed the act of patricide, meaning he unknowingly killed his own father. Following this, he went on to marry his own mother, again without realizing their kinship. The truth of their relationship was eventually revealed, and Oedipus’s wife and mother, Jocasta, tragically hanged herself when she discovered this shocking truth. However, Oedipus continued to rule as the king of Thebes until his death, even after the revelation of his incestuous marriage.