through divinity (ecclesiastical matters), holy matters; spiritually; when used to describe a relative, indicates the person is legitimate (mother, father, son, etc.) or refers to a godparent/godchild relationship; in the context of discussing marriage, it refers to a marriage sanctified by the Catholic church
James Lockhart, Nahuatl as Written: Lessons in Older Written Nahuatl, with Copious Examples and Texts (Stanford: Stanford University Press and UCLA Latin American Studies, 2001), 234.