The Greek that is transliterated as «Luke» in English is translated in Swiss-German Sign Language with the sign that for medical doctor, referring to Colossians 4:14.
«Luke» in Swiss-German Sign Language, source: DSGS-Lexikon biblischer Begriffe , © CGG Schweiz
For more information on translations of proper names with sign language see Sign Language Bible Translations Have Something to Say to Hearing Christians .