Cognomen Viengkeo (Viengkeo 
) , across the world, is a rare last name. The cognomen Viengkeo is characteristic of Laos, where it is quite a rare surname, France, where it is an extremely rare surname, and Thailand. More prevalently, Viengkeo is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Viengkeo | Germany, Thailand, France, Laos, United States |
Lai, Sirikoun, Siharath, Bounthon, Bounkeua, Borihanh, Phetdara, Xayalath, Xayarath, Singharaj, Bangphonethip, Bounemany, Bounleutay, Keosoulin, Himmavanh, Inthavong, Souvanarath, Chittavong, Phothisanh, Latsapanya, Lianthongsouk, Rattanavong, Sayahane, Sayavong, Sayasone, Sayarath, Tan, Sati, Mason, Tzong, White, Nokham, Ounlasy, Saysana, Siliboun, Sivilay, Vongprachanh, Sundara, Syluangkhot, Sysourath, Leksouphong, Johnson, Thomson, Visoury, Viyakhet, Xaykosy, Mounlavongsy, Mouanetrya, Somchay, and Insixiengmay