useless trivia: What Word Means: A Cloth Insert In A Seam?

Questions

in greek mythology who had a ship with a beam hewn from the 'speaking oaks of dodona'?

in greek mythology who had nine heads?

in greek mythology who helped theseus escape the labyrinth?

in greek mythology who hired daedalus to construct the labyrinth?

in greek mythology who is the mother of the muses?