This Yanagiwara family was a branch of the Hino family in the Manatsu line of the Northern House of the Fujiwara clan and it was a meika (family rank of which member can be promoted to Dainagon, immediately below Urinke).
この柳原家は藤原北家真夏流の日野家の庶流で、名家(大納言まで出世できる家格・羽林家の下)にあたる。