From BiblePortal Wikipedia

Perez [1]

one of the first Portuguese missionaries in Cochin China, was born about 1665. He joined the French missionaries, and was charged by the bishop of Berynthe to go to Bengarin and Jonsalam to make conversions. He arrived about 1671. and from those places wrote letters to the prelate who had sent him, in which were found interesting observations upon the country and its inhabitants. He died towards the close of the 17th century. See Relation des Missions des eveques Francais, p. 70.