Examples from the Web for certes
And then he cried out still in a very loud voice, "Certes, God hath deserted me entirely."
For, certes, King Mark will some time work some grievous ill upon you.
Certes, said he, well mote I shame to tell The fond encheason that me hither led.
Certes he would be a witless creature who would willingly adore either pictures or images of wood or stone.Of the Just Shaping of Letters|Albrecht Drer
Certes they grow not for vs, but for the Arabians and Grecians.Chronicles (1 of 6): The Description of Britaine|Raphaell Holinshed