Harlas were probably the ancestors of modern day Hararis. The rest were absorbed by Oromos and Somalis e.g. Xarla Koombe
I found this interesting:
https://www.revolvy.com/topic/Zay people&item_type=topic
"Zay people
The
Zay are a small ethnic group of about 5,000 people in
Ethiopia. They are also known as the
Laqi. They live on the islands of
Lake Zway, south of
Addis Ababa, and engage mainly in
fishing. The
Zay language belongs to the Southern branch of the
Ethiopian Semitic language family and is closely related to the languages spoken by the neighboring
Gurage ethnic group. The Zay belong to the
Ethiopian Orthodox Tewahedo Church.
Local tradition suggests that the Zay people comprise three streams of people that populated the islands of Lake Ziway between the early 14th and the mid-17th centuries.[1] It is believed that the Zay people spoke the ancient
Harla language.[2] The Zay economy is mainly based on
subsistence agriculture and
traditional fishing.[1] The Zay people cultivate maize, sorghum, finger millet, teff, pepper and barley, and raise cattle, goats, sheep, donkeys and chicken.[1] Island dwellers use papyrus boats for transport, while those on the shore use donkeys and horses.[1] Common health issues include malaria, schistosomiasis, diarrhoea and respiratory diseases.[1] The Zay people generally have limited access to modern health care and primarily rely on medicinal plants, although (as elsewhere in the country) environmental and cultural factors threaten both medicinal plants and traditional medical knowledge.[1]
See also
References
- Giday, Mirutse (2001). "An ethnobotanical study of medicinal plants used by the Zay people in Ethiopia" (PDF). CBM:s skriftserie. 3: 81–99. Retrieved 4 May 2011.
- Braukamper, Ulrich. Islamic History and Culture in South Ethiopia. LITverlag. p. 18. Retrieved 25 June 2016.
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Wikipedia Licensed under
CC-BY-SA."
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It says both that the Zay language is Southern Ethiopian Semitic and that the Adal Sultanate was Harla based with a port at Zeila. It does not necessarily say Harla is related to Gurage. Anybody have more or better info?
The Harla language is said elsewhere to be similar to the secret languages of both the Yibir and Gaboye. Any more info?