Also see definition of "Handkerchief" in Word Study
Handkerchief
Handkerchief [ebd]
Only once in Authorized Version (Acts 19:12). The Greek word (sudarion) so rendered means properly "a sweat-cloth." It is rendered "napkin" in John 11:44; 20:7; Luke 19:20.
HANDKERCHIEF [isbe]
HANDKERCHIEF - han'-ker-chif (soudarion): A loan-word from the Latin sudarium, found in plural in Acts 19:12, soudaria; compare sudor, "perspiration"; literally, "a cloth used to wipe off perspiration." Elsewhere it is rendered "napkin" (Lk 19:20; Jn 11:44; 20:7), for which see DRESS; NAPKIN.
Also see definition of "Handkerchief" in Word Study