Hasekura was baptized on 17 February by the royal chaplain Diego de Guzmán in the Convent of Las Descalzas Reales, and renamed Felipe Francisco Hasekura in honor of the king and Sotelo's order. The baptism ceremony was to have been conducted by the Archbishop of Toledo, Bernardo de Sandoval y Rojas, though he was too ill to actually carry this out, and the Duke of Lerma – the main administrator of Phillip III's rule and the de facto ruler of Spain – was designated as Hasekura's godfather.