Ramesuan or Rammesuan (Old , ; Modern , ; Rāmēśvara; "Lord Rāma") was a Thai royal title given to crown princes of the Ayutthaya Kingdom. It may refer to:
Ramesuan (king of Ayutthaya), reigned twice in 1369–1370 and 1388–1395, a son of King Ramathibodi I Ramracha, reigned 1395–1409, a son of King Ramesuan Borommatrailokkanat, reigned 1448–1488, a son of King Intharacha Ramesuan (prince of Ayutthaya), a son of King Maha Chakkraphat, captured and taken to Burma in the War of the White Elephants (1563–64) Ekathotsarot, reigned 1605–1620, a son of King Mahathammarachathirat
See also Rameswaram (disambiguation)