Wiktionary
certeine
a. (archaic spelling of certain English)
Usage examples of "certeine".
Crist, which that is to every harm triacle, By certeine meenes ofte, as knowen clerkis, Dooth thyng for certein ende, that ful derk is To mannes wit, that for oure ignorance Ne konne noght knowe his prudent purveiance.
The presentes been ful roially yfet, This is to seyn, the swerd and the mirrour, And born anon into the heighe tour With certeine officers ordeyned therfore.