Descent henceforth was reckoned in the paternal line, and society had become patronymic instead of metronymic.
metronymic, met-ro-nim′ik, adj. derived from the name of one's mother, or other female ancestor.
"derived from the name of a mother or maternal ancestor," 1881, from Late Greek metronymikos "named for one's mother," from meter (genitive metros) "mother" (see mother (n.1)) + onyma (see name (n.)). Related: Metronymically (1822).