LSJ
ου, ὁ, dealer in onions, PPar. 5xx8 (ii BC, in form κρομβυοπώλης, cf. Wilcken Ostr. i p. 691), Poll. 7.198.
Liddell-Scott-Jones, Greek-English Lexicon (9th ed., 1940)
Pape
ὁ, Zwiebelhändler, Poll. 7.198.
Pape, Griechisch-deutsches Handwörterbuch (3. Aufl., 1914)