Rama VI (ten hoang gia: Phra Bat Somdet Phra Poramenthra Maha Vajiravudh Phra Mongkut Klao Chao Yu Hua, tieng Thai: พระบาทสมเด็จพระปรเมนทรมหาวชิราวธฯ พระมงกฎเกลาเจาอยหัว) (1 thang 1 nam 1880 – 26 thang 11 nam 1925) la vi vua thu sau cua vuong trieu Chakri, Thai Lan. Ong tri vi tu nam 1910 đen nam 1925.


Thoi nien thieu Rama VI sinh ngay 1 thang 1 nam 1880, co ten khai sinh la Vajiravudh (วชิราวธ). Ong la con thu cua vua Chulalongkorn (Rama V) va hoang hau Saovabha. Khi moi 7 tuoi, ong đa đuoc phu vuong gui sang Anh hoc tai Hoc vien Quan su Hoang gia Sandhurst. Lon len, ong hoc lich su va luat hoc tai Christ Church, Oxford. Chinh vi the, ong chiu anh huong sau sac cua van hoa Anh. Khi nguoi anh la thai tu Vajirunhis bat ngo qua đoi luc moi 15 tuoi, ong đuoc chi đinh lam thai tu, va sau đo khi phu vuong qua đoi, ong tro thanh quoc vuong cua Xiem.


Thanh qua tri vi Rama VI tiep tuc nhung no luc canh tan đat nuoc cua to tien. Nhung cai cach đang chu y ma ong đa tien hanh bao gom:

Cai cach phan cap hanh chinh,
Cho thiet ke moi quoc ky cua Xiem
Ra sac luat ve viec đat ten ho cua nguoi Thai Lan vao nam 1913, bao gom ca nguoi Thai goc Hoa cung phai mang ho Thai.
Đat le goi ten vua Thai theo thu tu the he cua phuong Tay. Cung bat đau tu thoi cua ong, tuc le goi vua Xiem la Rama bat đau.
Bai bo che đo đa the.
Cai cach he thong giao duc theo mo hinh truong pho thong va truong đai hoc cua phuong Tay. Thanh lap he thong giao duc pho cap. Ong đa cho thanh lap Đai hoc Chulalongkorn vao nam 1917; đay la truong đai hoc kieu phuong Tay đau tien o Thai Lan.
Gui sinh vien sang Anh, Phap du hoc.
Bai bo cac chinh sach uu đai danh cho nguoi goc Hoa.
Thanh lap hoi chu thap đo cua Thai Lan.
Thiet lap co so ha tang quy mo, trong đo co san bay Don Muang, cac nha may phat đien, nha may cap nuoc sach.
Đac biet, ong đa co y đinh tien hanh cai cach dan chu va tu bo che đo quan chu chuyen che, tuy nhien vi nhieu ly do ma đieu nay đa khong thuc hien đuoc.


= Am muu đao chinh =
Cuoi thap nien 1910 đau thap nien 1920, Xiem gap thien tai (han han) va nan đoi. Nhung kho khan kinh te cong them nhung rac roi chinh tri khien cho mau thuan giua vua va cac quy toc-quan chuc nay sinh. Va hau qua la cuoc đao chinh no ra vao ngay 11 thang 11 nam 1911. Cac nha lanh đao cuoc đao chinh đinh bat giam quoc vuong, lat đo che đo quan chu, va thanh lap nen cong hoa. Tuy nhien, cuoc đao chinh đa khong thanh cong.


= Chinh truong quoc te =
Trong thoi ky Chien tranh The gioi thu nhat, Rama VI đa quyet đinh đua Thai Lan vao vong tham chien ben phe Quoc Lien. Mac du khong co giao tranh, nhung su viec nay cung co tac dung lam tang vi the chinh tri cua Thai Lan tren chinh truong quoc te.


Tam hon van nghe Ngoai cuong vi quoc vuong, Rama VI con la mot nghe si thuc thu, danh tieng. Ong viet tieu thuyet, truyen ngan, kich va ca bai vo cho cac tap chi. Tu ong đa dich mot so kich ban cua Shakespeare sang tieng Thai. Trong mot so tac pham, ong đa goi nguoi Hoa o Xiem, nhat la cac thuong nhan, la "Do Thai cua phuong Đong" do anh huong kinh te to lon cua ho o Xiem.
Rama VI bang ha ngay 25 thang 11 nam 1925. Mieu hieu cua ong la Phra Mongkut Klao Chaoyuhua (tieng Thai: พระบาทสมเด็จพระมงกฎเกลาเจาอยหัว).
Rama VI khong co con trai nen sau khi bang ha, nguoi ke vi la nguoi em trai.


Danh hieu 1 thang 1 nam 1880 – 30 thang 4 nam 1888: Somdet Phra Chao Luk Ya Thoe Chaofa Maha Vajiravudh (สมเด็จพระเจาลกยาเธอ เจาฟามหาวชิราวธ, "Hoang tu Maha Vajiravudh")
30 thang 4 nam 1888 – 4 thang 1 nam 1895: Somdet Phra Chao Luk Ya Thoe Chaofa Maha Vajiravudh Krom Khun Thep Dvaravati (สมเด็จพระเจาลกยาเธอ เจาฟามหาวชิราวธ กรมขนเทพทวาราวดี, "Hoang tu Maha Vajiravudh, Hoang tu cua Dvaravati")
4 thang 1 nam 1895 – 23 thang 10 nam 1910: Somdet Phra Boroma Orasathirach Chaofa Maha Vajiravudh Sayam Makutratchakuman (สมเด็จพระบรมโอรสาธิราช เจาฟามหาวชิราวธ สยามมกฎราชกมาร, "Hoang tu Maha Vajiravudh, Hoang thai tu Xiem")
23 thang 10 nam 1910 – 25 thang 10 nam 1910: Somdet Phra Boroma Orasathirach Phusong Samret Ratchakan Phaendin (สมเด็จพระบรมโอรสาธิราชผทรงสำเร็จราชการแผนดิน)
25 thang 10 nam 1910 – 11 thang 11 nam 1910: Somdet Phra Chao Yu Hua (สมเด็จพระเจาอยหัว, "vua")
11 thang 11 nam 1910 – 11 thang 11 nam 1916: Phra Bat Somdet Phra Poramenthra Maha Vajiravudh Phra Mongkut Klao Chao Yu Hua (พระบาทสมเด็จพระปรเมนทรมหาวชิราวธ พระมงกฏเกลาเจาอยหัว, "vua Maha Vajiravudh")
11 thang 11 nam 1916 – 26 thang 11 nam 1925: Phra Bat Somdet Phra Ramathibodi Si Sinthra Maha Vajiravudh Phra Mongkut Klao Chao Yu Hua (พระบาทสมเด็จพระรามาธิบดีศรีสินทรมหาวชิราวธ พระมงกฎเกลาเจาอยหัว)


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