I just looked back. It doesn't mention that.
https://en.wikipedia.org/wiki/Fakr_ad-Din_Mosque
"The Fakr ad-Din Mosque (Arabic: مسجد فخر الدين زنكي), also known as Masjid Fakhr al-Din, is the oldest mosque in Mogadishu, Somalia. It is located in Hamar Weyne (literally "Old Hamar"), the oldest part of the city. It is the 7th oldest mosque in Africa.
Description[edit]
The mosque was built in 869 by the first Somali Sultan of the Sultanate of Mogadishu and founder of Garen Dynasty called Fakr ad-Din. He is believed to hail from the noble Somali tribe known as Ajuran (clan)."
I think you are aware that Fakr ad-Din established the Fakr ad-Din dynasty and not the Garen.