Bisa ga Tarihi na Arewacin Thai, Lavo ya samo asali ne daga Phraya Kalavarnadishraj, wanda ya zo daga Takkasila a 648 AD.^[16] A cewar bayanan Thai, Phraya Kakabatr daga Takkasila (an ɗauka cewa birnin Tak ne ko Nakhon Chai Si) ^[17] ya kafa sabon zamani, Chula Sakarat a 638 AZ, wanda shine zamanin da Siamese suka yi amfani da shi da kuma Burma har zuwa karni na 19.Ɗansa, Phraya Kalavarnadishraj ya kafa birnin bayan shekaru goma.Sarki Kalavarnadishraj ya yi amfani da sunan "Lavo" a matsayin sunan masarautar, wanda ya fito daga sunan Hindu "Lavapura", ma'ana "birnin Lava", dangane da tsohon birnin Kudancin Asiya na Lavapuri (Lahore na yanzu).^[18] A kusan ƙarshen karni na 7, Lavo ya faɗaɗa zuwa arewa.Ana samun 'yan bayanai game da yanayin masarautar Lavo.Yawancin abin da muka sani game da Lavo daga shaidar archaeological ne.Kusan karni na goma, jihohin Dvaravati na birni sun haɗu zuwa mandalas guda biyu, Lavo (Lopburi na zamani) da Suvarnabhumi (Suphan Buri na zamani).A cewar wani almara a tarihin Arewa, a shekara ta 903, wani sarkin Tambralinga ya mamaye Lavo ya nada wani basarake na Malay a kan karagar Lavo.Yariman Malay ya auri wata gimbiya Khmer wadda ta gudu daga zubar da jinin daular Angkoriya.Ɗan ma'auratan ya yi hamayya da kursiyin Khmer kuma ya zama Suryavarman I, don haka ya kawo Lavo ƙarƙashin Khmer ta hanyar haɗin gwiwar aure.Suryavarman Na kuma faɗaɗa cikin Khorat Plateau (daga baya mai salo "Isan"), yana gina haikali da yawa.Suryavarman, duk da haka, ba shi da magada maza kuma Lavo ya kasance mai zaman kansa.Bayan mutuwar sarki Narai na Lavo, duk da haka, Lavo ya fada cikin yakin basasa mai zubar da jini kuma Khmer karkashin Suryavarman II ya yi amfani da shi ta hanyar mamaye Lavo kuma ya sanya dansa a matsayin Sarkin Lavo.Maimaitawar amma dakatar da mulkin Khmer daga ƙarshe Khmerized Lavo.An canza Lavo daga birnin Theravadin Mon Dvaravati zuwa na Hindu Khmer.Lavo ya zama tushen al'adun Khmer da ikon kogin Chao Phraya.Bas-relief a Angkor Wat yana nuna sojojin Lavo a matsayin ɗaya daga cikin ma'aikatan Angkor.Wani abin lura shi ne cewa an nuna sojojin Tai a matsayin wani bangare na sojojin Lavo, karni daya kafin kafuwar "Mulkin Sukhothai".