The posthumous title, 'Teimei (貞明),' was taken from one sentence of the source text, "Ekikyo (I Ching [Yi Jing] or The Book of Changes).": 'The path ways of the sun and the moon (or times of days and months) are firm adherence to one's principles (Tei, [貞]) and clear (mei, [明]).'
追号の「貞明」は、『易経』にある「日月の道は貞（ただ）しくして明らかなり」の一文を出典とする。