Gallio = "One who lives on milk"
1) Junius Annaeus Gallio, the Roman proconsul of Achaia when Paul was at Corinth, 53 A.D., under the emperor Claudius. Act 18:12. He was brother to Jucius Annaeus Seneca, the philosopher. Jerome in the Chronicle of Eusebius says that he committed suicide in 65 A.D. Winer thinks he was put to death by Nero.
Part of Speech: noun proper masculine
Of Latin origin; Gallion (that is, Gallio), a Roman officer: - Gallio
These two sites give similar information, with the definition from several dictionaries and statistics on the use of the word.
Perseus Digital Library
University of Chicago's Logion lexicon
Thayer's dictionary plus other information.
From this site's dictionary (in Italian)
Click on the first column to search for that word as a form of the root Γαλλίων; click on the second column to search for that grammatical form of the root Γαλλίων; click on the third column to search for that word and grammatical form; click on the total to search for the root Γαλλίων.