A Pehin in Brunei

Someone from the diplomatic circle came to see me asking about Brunei honours system. Apparently he read an article in BT when I wrote about the Order and Decorations one can get. But this is mostly the Datukships etc. He was more interested in the cheteria and pehn manteri.Explaining is not an issue. What was difficult was that I cannot remember what each of those Pengiran Cheteria and Pehin