Cognomen Phiathep (Phiathep 
) , worldwide, is quite a rare family name. The cognomen Phiathep is habitual in Laos, where it is quite a common surname, Thailand, where it is a very rare surname, and the United States, where it is an extremely rare surname.
Ly, Somphoun, Anonglath, Christin, Bounhong, Bouakhay, Kolakanh, Phouvong, Napapassor, Maniphone, Chiempradith, Khamphanh, Khamsavan, Phasakone, Phonethip, Phetmaniphone, Lithideth, Narumonporn, Nouanchanh, Nonthakorn, Phouthasone, Phouthakhin, Savanthon, Niksanh, Lathipon, Phokhao, Amy, Pam, Mouy, Mina, Miny, Sone, Boun, Lisa, Tony, Tino, Phetmanivone, Kevin, Leuth, Jenny, Natda, Nhong, Manoly, Latxia, Nouykham, Shyanne, Sithong, Palinda, Patty, and Viengsavanh