Ongamo (or Ngasa) is an endangered or extinct Eastern Nilotic language of Tanzania. It is related to the Maa languages, but it is more distantly related to them than the Maa languages are to each other. The Eastern Nilotic languages are one of the three primary branches of the Nilotic languages, themselves belonging to the Eastern Sudanic subfamily of Nilo-Saharan; they are believed to have begun to diverge about 3,000 years ago, and have spread southwards from an original home in Equatoria in the... The Maa languages, or Maa dialects, are a group of Eastern Nilotic languages spoken in parts of Kenya and Tanzania by more than a million speakers altogether. ...
In order to judge if a language is endangered, the number of speakers is less important than the age distribution; there may be 500,000 speakers of the Breton over 50 years of age, but fewer than 2,000 under 25 years of age - it is likely Breton will die out in the next half-century.
There are languages in Indonesia reported to be in a similar situation with as many as two million native speakers alive now, but all of advancing age, with practically no transmission to the young.
Similarly, the Hawaiian language has only about 1,000 speakers but it has stabilized at this number, and now has school instruction in the language from kindergarten through college.