Cognomen Piyanuj (Piyanuj 
) , around the globe, is an extremely rare last name. Much more prevalently, Piyanuj is the forename as well as the last name.
Thana, Kalayanamit, Charuchinda, Prateeptas, Palangtanasukit, Sethaphanich, Thiradharma, Janesiriwanich, Ruckpanich, Permpanich, Somprasit, Nimityongskul, Rerkindra-Aree, Phertiyanan, Kuenkongdee, Kositwuthi, Bejraputra, Madnurak, Poolsiri, Yentch, Kunwiwat, Mepokee, Kalyanamitr, and Ratprasatporn