This name change took place around the same time another Minamoto scion took the clan name Takeda.
Minamoto no Mitsuyuki
His great-grandfather won Kai Province during the Gosannen War.
The new clan name derived from the location of his estates in Kai Province.
- (Image Attribution) 663highland. “Nanbu-jinja02s3200.” Wikipedia. 24 August 2007. CC BY-SA 3.0.
- “Nanbu-shi” on Harimaya.com
- “Nanbu clan.” Wikipedia.