Shinjaku-Hosshinno was the son of TACHIBANA no Gishi (Noriko), whose wife was the daughter of SUGAWARA no Michizane; the name became apparent years later, when SUGAWARA no Michizane had a false charge brought against him.
橘義子からは真寂法親王があり、菅原道真女を妻としたことから、後年菅原道真の誣告に際してその名が出た。