He was educated at Cambridge and was also for a time served in the British Army. This is believed to be the explanation for his willingness to support the Allies. After the First World War, was elected Thailand into the League of Nations. Before the war it was used no family name in Thailand. However, Rama VI decided that all his subjects would begin to bear the family name.
Ito ay pinaniniwalaan na ang mga paliwanag para sa kanyang pagpayag upang suportahan ang mga kaalyado. Pagkatapos ng Unang Digmaang Pandaigdig, ay inihalal Taylandiya sa Liga ng mga Bansa. Bago ang digmaan, ito ay ginagamit ng walang family name sa Taylandiya. Gayunpaman, nagpasya Rama VI na ang lahat ng kanyang mga paksa ay magsisimula upang madala ang family name.