Family name Janthep (Janthep 
) , worldwide, is a rare surname. The cognomen Janthep is characteristic of Thailand, where it is a rare surname, Malaysia, where it is an extremely rare surname, and the United States.
Thip, Whathin, Athiratsakon, Kornthip, Jonggontorn, Jureerat, Nawakotchamon, Nongkran, Warittron, Jirawan, Suparanan, Chamaitip, Chonnikan, Boonyawee, Katanyuta, Pongnarin, Thaweesin, Thitaporn, Vanitchaya, Suttipong, Lamduan, Phairot, Pinyada, Suwipa, Amphon, Authai, Prarin, Phulee, Nirada, Wathin, Wasaya, Yosita, Maliwan, Supansa, Supatra, Anilthita, Aniltita, Adithep, Apichet, Chairat, Pakamas, Pongpak, Prapassorn, and Atcharawadee