2779.180 - This fact is from Jim's book. Antimon does not seem to have explicitly been a Melcamot, but presumably this is the line that eventually became the Melcamots. (Jim says, "I'm not sure they kept family names, just a single name like Kyriel and Apollyon and Antimon and stuff.")

"Kyriel" and "Apollyon" and "Antimon" sound more like Standard names, than Integral names. Perhaps Standard was still spoken more commonly in the early days of the Hegemony.