Mahidol Adulyadej, Thai prince (born 1892)

Mahitala Dhibesra Adulyadej Vikrom, the Prince Father, formerly Prince Mahidol Adulyadej, Prince of Songkhla or Mahidol Songkla, was the father of King Ananda Mahidol and King Bhumibol Adulyadej of Thailand, and the paternal grandfather of King Vajiralongkorn. He was also regarded as the father of modern medicine and public health in Thailand. He also founded the House of Mahidol or the present Royal Family of Thailand. His two sons reigned for more than eight decades, longer than the Ibn Saud siblings of Saudi Arabia, and the Nahyan siblings of Abu Dhabi.