LSJ
ον, gen. ονος, = πενταπλάσιος, c. gen., J. AJ 12.2.8, Ael. NA 16.12, Heliod. in EN 98.25 ; πενταπλασίονα ἀποτεῖσαι to make five-fold restitution, Plu. 2.846c.
Liddell-Scott-Jones, Greek-English Lexicon (9th ed., 1940)
Pape
ονος, = πενταπλάσιος, Sp.
Pape, Griechisch-deutsches Handwörterbuch (3. Aufl., 1914)