How was Theseus born?

Answer 1

This is a myth, so the "date" is not much of a realistic answer, because it never existed. However, this myth was written in the mid- 4th century, to the 5th century, when it was revised.( To make it more enhanced) The myth states that "King Theseus" was 'born' into mythology (sentence 2).

Answer 2

Aethra, the mother of Theseus, mated with both Aegeus and Poseidon to produce Theseus.