ทวิราชาธิปไตย • (tá-wí-raa-chaa-tí-bpà-dtai)
From Sanskrit द्वि (dvi, “bi-; double; dual; two; etc.”) + राज (rāja, “king; monarch; etc.”) + आधिपत्य (ādhipatya, “lordship; sovereignty; supremacy; etc.”); literally "supremacy of two monarchs".