Family name Upenieks (Upenieks 
) , in all the world, is quite a rare surname. The cognomen Upenieks is characteristic of Northern Europe, particularly Latvia, where it is quite a common surname, Lithuania, where it is a rare surname, and Estonia. In absolute terms, it is commonest in Latvia, the United States, and Lithuania.
| jānis upenieks Latvian musician, LV (b. 1888) |
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| kārlis upenieks Latvian association football player, LV (b. 1914) |
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| pēteris upenieks (b. 1906) |
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jānis upenieks Latvian economist and politician, LV (b. 1988) |
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| gunārs upenieks Latvian politician, LV (b. 1964) |
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| gundars upenieks Latvian biathlete, LV (b. 1971) |
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| laura upenieks researcher (ORCID 0000-0002-1200-2471) |
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| mārtiņš upenieks LV (b. 1989) |
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| oskars arturs upenieks (b. 1993) |
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| arno upenieks |
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Mr, Artis, Arnis, Ardis, Arvis, Chris, Kelly, Ralfs, Robin, Daina, Anita, Dixie, Girts, Gints, Laura, Janis, Jenni, Juris, Edijs, Eriks, Valda, Gatis, Andis, Andre, Aldis, Ms, Ed, Ben, Teo, Ivo, Mark, Mara, Maia, Mike, Sage, Alex, Asta, Atis, Rick, John, Toms, Eric, Erik, Maria, Maris, Marts, Ilmar, and Ivars