πενθερός, ὁ,
father-in-law, [[ 8th c.BC: Ilias Homerus Epicus “Illiad” 6.170, 8th c.BC: Odyssea Homerus Epicus “Odyssey” 8.582, Legal Draconisap. 4th c.BC: Demosthenes Orator 43.57 (_plural_), 5th c.BC: Herodotus Historicus 3.52, “PCair.Zen.” 369.2 (3rd c.BC) ] Refs 8th c.BC+]; λαβὼν Ἄδραστον π. [[ 5th c.BC: Sophocles Tragicus “Oedipus Coloneus” 1302 ] Refs 5th c.BC+]: in plural, parents-in-law, [[ 5th c.BC: Euripides Tragicus “Hippolytus” 636. ] Refs 5th c.BC+]
__II generally, connexion by marriage, e.g. brother-in-law, [[ [prev. author] “El.” 1286 ] Refs]; also, ={γαμβρός}, son-in-law, [[ 5th c.BC: Sophocles Tragicus “Fragmenta” 305 (_plural_)] Refs 5th c.BC+]. (Cf. Sanskrit bándhus 'kinsman', Lithuanian beñdras 'comrade', Gothic bindan 'bind'.)