Surname อุปถัมภ์ (อุปถัมภ์ 
, Fost 
, Upatham 
) , throughout the world, is quite a rare family name. The last name อุปถัมภ์ is characteristic of Thailand, where it is quite a rare surname, Slovenia, where it is a rare surname, and Netherlands. Measured by absolute frequency, it is commonest in Thailand, the United States, and Canada. Very seldom, อุปถัมภ์ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| อุปถัมภ์ | Thailand |
| Fost | Germany, Canada, United States, United Kingdom, Democratic Republic of the Congo |
| Upatham | Australia, Thailand, United States, Singapore |
| Uppatham | Thailand, United States |
Apatorn, Aupathe, Aupathon, Auppatai, Auppathamp, Auppathon, Aupphatam, Aupphatana, Aupphatark, Auprakhot, Auptham, Foster, Fosterroberts, Fostier, Impatra, Opatham, Opatpunya, Opatragoon, Opatumphun, Oupahat, Oupatharm, Oupathem, Oupathom, Oupatthaya, Oupatump, Oupetch, Ouphad, Ouphatum, Ouphithak, Ouppadidsri, Ouppamarn, Ouppatchar, Ouppatha, Ouppathamp, Ouppathum, Ouppatranpeecha, Ouptha, Padron, Pathagorn, Pathree, Patradol, Patraorn, Patraprn, Patrawion, Patronising, Patropong, Phanthubandity, Phatraon, Phatron, Ponsorm, Sumpron, Suparpond, Suporsi, Suppasis, Supsanor, Supson, Supspon, Touchapath, Touchaponth, Uaphantasath, Ubpatham, Ugsonkid, Upahart, Upamung, Uparain, Upartham, Uparthum, Upat, Upatap, Upatatha, Upatchar, Upath, Upathak, Upathan, Upathe, Upathong, Upathumnarakorn, Upathumphun, Upathumpun, Upatrapin, Upatun, Uphaijit, Uphaiphak, Uphaiphat, Uphanporn, Uphantha, Uphantip, Uphat, Uphatham, Uphatraphin, Uphaunwan, Upholchareon, Upholcharoen, Upinjai, Upinpcuk, Upmathao, Uppachit, Uppadit, Uppahin, Uppakit, Uppamarn, Uppamat, Uppanunt, Upparra, Uppasit, Uppatai, Uppatak, Uppatcha, Uppatep, Uppathan, Uppathang, Uppatharm, Uppatharn, Uppathi, Uppathong, Uppathum, Uppatisombat, Upphatham, Upphathum, Upprajuntr, Upprakom, Uppranan, Upprathong, Uppravan, Uppsthak, Upratham, Upreethee, Utpon, and Uupratha