Σεύθης
From LSJ
ἐγώ εἰμι τὸ φῶς τοῦ κόσμου· ὁ ἀκολουθῶν μοι οὐ μὴ περιπατήσῃ ἐν τῇ σκοτίᾳ ἀλλ' ἕξει τὸ φῶς τῆς ζωῆς → I am the light of the world; he that followeth me shall not walk in darkness but shall have the light of life (John 8:12)
Russian (Dvoretsky)
Σεύθης: ου ὁ Севт (царь фракийского племени одрисов) Thuc., Xen., Arst.