Family name อุ่นใจ (Aunjai 
, Unjai 
, Ounjai ) , all around the world, is quite a rare cognomen. The cognomen อุ่นใจ is habitual in South-eastern Asia, particularly Thailand, where it is quite a rare surname, Singapore, where it is a rare surname, and Malaysia, where it is a very rare surname. Much less frequently, อุ่นใจ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Aunjai | United Kingdom, Thailand, United States |
| Unjai | Norway, Thailand, Singapore, United States, Malaysia |
| Ounjai | Thailand, United States |
Aeuychai, Ainjai, Aonjai, Aonjaksao, Aonsuratoom, Aoonjai, Aornjai, Aounjai, Arbjai, Ardjai, Arksonjai, Auemjai, Aukenchai, Aunaemjai, Aunchaiee, Aunjaiayi, Aunjaijeen, Aunjairam, Aunjaiyai, Aunluak, Aunnamajai, Aunnamjai, Aurnjai, Autsajai, Barnjai, Baungjai, Bhoomjai, Bhumjai, Casudjai, Cauenjai, Chobjai, Chudjai, Coomjai, Cruejai, Cuenjai, Cwunjai, Darwjai, Deomchai, Eamjai, Eunjai, Fuekjai, Fuekjaidee, Glabjai, Heagjai, Heangjai, Hmuenjai, Homsudjai, Homyenjai, Hoomjai, Hormjai, Huabjai, Huenjai, Itnamjai, Jamgjaiyen, Jiemsaijai, Jlamjai, Joungjai, Kaunjai, Kewjai, Khaunjai, Kheunjai, Khounjai, Kiengjai, Klayjaim, Koonjai, Kowjai, Kuenjai, Liumjai, Luearjai, Luenchai, Maenjai, Marnjai, Meekwarmpien, Meonjai, Meunjai, Mhunjai, Muennjai, Nadjai, Naemjai, Naoonchai, Narmjai, Nasomjai, Neojai, Ngaojai, Ngarmjai, Nomjai, Nuechai, Numsoodjai, Nungjai, Nuongjai, Oaijai, Oamjai, Obunjai, Ohnjai, Ommjai, Onaumphai, Oojai, Oonjai, Ooyjai, Ornsudjai, Ouanjai, Ouetjai, Ounemjai, Ounjaiia, Ounjaijeen, Ounjaisup, Ouyjai, Padyenjai, Paejai, Paunjai, Peaegjai, Peianjai, Phaaunjai, Phaenjai, Phaunjai, Phiawjai, Phiemjai, Phienjai, Phomjai, Phompunjai, Phomsaenjai, Phookjaijae, Phooyiamjai, Phormjai, Pookjai, Pootjai, Pormpanjai, Pounginjai, Poungjai, Powjai, Promjamjai, Promjumjai, Promtanjai, Ptomjai, Puengjai, Raojai, Rareongjai, Reingjai, Roonjai, Roumjai, Saerjai, Saunjai, Soomjai, Soomjaimaiy, Sounchai, Sungroumjai, Taeanjai, Taimjai, Taounjai, Tauenjai, Taunjaiya, Tawjai, Teangjai, Teimjai, Temjai, Teunjai, Thermchai, Theunjai, Thiarmjai, Thounjai, Thuaenjai, Thunkitjai, Tidjai, Tieamjai, Tingjai, Toenjai, Toeonjai, Treungjai, Triemjai, Trounjai, Truanjai, Trunjai, Tuandjai, Tuarnjai, Tubjai, Tueinjai, Tuienjai, Tunkjai, Tuoenjai, Tuonchai, Tweanjai, Uasajai, Uenhapai, Unchai, Undjai, Unemjai, Unjaiyai, Unmueangjai, Unnjai, Untemjai, Uonchai, Uonjai, Uoodjai, Uoonjai, Uthamjai, Uuangjai, Waewjai, Yawjai, Yeamjai, Yooruamjai, Younchai, Younjai, Yuedjai, and Yumjai