Family name Piyanus (ปิยะนัส , Piyanus ) , throughout the world, is an extremely rare cognomen. Much more frequently, Piyanus is the forename as well as the last name.
ปิยะนุส
Assuttranon, Chaikajornwat, Wichitpan, and Puangmanee
, Piyanus 
) , throughout the world, is an extremely rare cognomen. Much more frequently, Piyanus is the forename as well as the last name.