--- In qalam@yahoogroups.com, "Peter T. Daniels" <grammatim@...>
> Any connection with Ethnologue's 3-letter codes?

You mean beyond often being inspired by the name of the language? I
think the simple answer is, 'No.'. For example, the codes for
Cherokee are chr (ISO-639) and CER (Ethnologue). It's a shame they
don't match up. But then, some of the ISO 639-2 codes are for other
members of a family or geographical group, e.g. 'other Romance'.