- Original: Ὀνήσιμος - Transliteration: onesimos - Phonetic: on-ay'-sim-os - Definition: onesimus = profitable or useful 1. a Christian slave of Philemon - Origin: from G3685 - TDNT entry: None - Part(s) of speech: Noun Masculine - Strong's: From G3685 ; profitable; Onesimus a Christian: - Onesimus. Total KJV Occurrences: 2 • Onesimus, 2 Colossians 4:9; Philemon 1:10