Since Rinsho taishi emigrated to Japan and docked at Tatarahama in Suo Province, he called himself 'Tatara,' and thereafter he moved to Ouchi Village, so he is said to have used a family name of Ouchi.
琳聖太子が日本に渡り、周防国多々良浜に着岸したことから「多々良」と名乗り、後に大内村に居住したことから大内を名字としたとする。