Ekathotsarot (Thai: เอกาทศรถ, pronounced [ʔēː.kāː.tʰót.sā.rót], Ekādaśaratha) or Sanphet III (Thai: สรรเพชญ์ที่ ๓); 1560 – 1610/11) was the King of Ayutthaya from 1605 to 1610/11[3] and overlord of Lan Na from 1605 to 1608/09, succeeding his brother Naresuan. His reign was mostly peaceful as Siam was a powerful state through the conquests of Naresuan. It was also during his reign that foreigners of various origin began to fill the mercenary corps. In particular, the king had a regiment of professional Japanese guards under the command of Yamada Nagamasa.[4]: 51 Right around Ekathotsarot's reign, the English first came to Siam in 1612.