King Loiyumba (), also known as Meidingu Loiyumpa, was a Meitei monarch and a ruler of Kangleipak kingdom. He was the first king to order a written constitution in the 11-12th century CE which is known as the Loiyumpa Silyel (Loiyumba Sinyen).Naorem Sanajaoba, Manipur Treaties and Documents-Vol I,1993, New Delhi. Book I: "Twelfth Century Meetei Constitution To Pemberton Report", http://dspace.nehu.ac.in/bitstream/1/9804/1/Manipur%20treaties%20%28N%20Sanajaoba%29.pdf.
Roso Phishahanba was appointed the head of weaving loisang (department) during the time of Meidingu Loiyumba. The Puya "Loiyumpa Silyen" or "Loiyumba Shinyen" records the names of royal weavers such as Naotam Phishapa, Ngangti Phishapa, Yangnu Phishapa, Heisu Naha Phishapa and more.
Contributions King Loiyumba reforms the administrative system. He reform/introduced Lanlup and decentralized his kingdom into six panas.
The six panas are i. Angom Lup/Luplen Lup (chief Lup)
ii. Nongmai Lup/Thoucha Lup
iii. Aakong Lup/Kongcha Lup
iv. Khurai Lup/Lupkhupa Lup
v. Chingcha Lup
vi. Khaicha Lup
Military expeditions He defeated the Sektas (Chakpa people). He collect tribute from the people of Haoku and Leihou.
According to the court chronicles, the singing of Ougri started from his time.
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