Cognomen Panyajai (Panyajai 
) , worldwide, is a rare family name. The last name Panyajai is characteristic of South-eastern Asia, particularly Thailand, where it is a rare surname, and Philippines, where it is an extremely rare surname.
Wisit, Parichat, Pathitta, Papischaya, Rapeeporn, Naraporn, Nipaporn, Nutchaya, Wilaiwan, Wuttinun, Parnuphan, Pathumporn, Duangnate, Thiraphat, Napatsorn, Kanittakarn, Krongkan, Kittisak, Kanitnat, Aphitchaya, Sakorn, Sakrin, Rachel, Narong, Natcha, Yotaka, Sarawut, Jetsadakorn, Atchara, Panladda, Thammes, Nattida, Wiliwan, Sirintip, Surachet, Supattra, Patinya, and Thunchanok