Complex sentence: Ned Ludd or Ned Lud is the person who the Luddites took their name from, and was the inspiration for the character of "King (also known as Captain or General) Ludd" who was supposedly the Luddites' leader and founder.
Split into simpler sentences: Ned Ludd or Ned Lud is the person from whom the Luddites took their name. His actions were the inspiration for the mythical character of "Captain Ludd" (also known as King or General) who became the Luddites' imagined leader and founder.