Usage: 5 forms in 38 verses

Liddell-Scott-Jones

εὐθής (euthēs) right G:A

εὐθής, ές,

only in later [LXX]; βιβλίον τοῦ εὐθοῦς the Book of the Righteous (Jashar),[LXX+6th c.AD+]

LSJ Scripture Refs: LXX.1Kgs.29.6 ☩ LXX.Ps.118.137*LXX.2Kgs.1.18