What is "al-khasawneh"

Al-Khasawneh or Khasawneh (other transliterations include Khassawneh, khassaweneh, Khasawinah, Khassawnih, Khasawnih, Khasawineh, Khassawineh, Khassawneh, Khasawne, Khasawna, and Khasawnah all of which may also be preceded by 'Al' or 'El'), is a prominent Arab Muslim clan descending from the noble family of Imam Ja'far al-Sadiq and Imam Husayn ibn Ali.