In a military epic "Seiryoki" (volume seven 'Shinmin Kangetu shu' is said to be the oldest agricultural treatises in Japan) which is said to have been written by a retainer of the Iyo Saionji clan, Kiyoyoshi DOI, there is a description on the clan, however, it is said that the description lacks the credibility.
ちなみに伊予西園寺氏に仕えていた土居清良が書いたとされる軍記物『清良記』（巻七「親民鑑月集」は日本最古の農書とされている）には同氏に関する記述があるが、信憑性には乏しいと言われている。