Last name Kalvaitis (Kalvaitis 
, Калвайтис 
) , worldwide, is quite a rare family name. The surname Kalvaitis is characteristic of Northern Europe, particularly Lithuania, where it is quite a common surname, Latvia, where it is a rare surname, and Norway. Measured by absolute frequency, this name is the most popular in Lithuania, the United States, and Russia.
| VARIANT | COUNTRY |
|---|---|
| Kalvaitis | Canada, Lithuania, United Kingdom, United States, Latvia |
| Калвайтис | Russia, Ukraine |
Калваитис, Калвайтіс, and Кальвайтіс
| juozas kalvaitis Lithuanian composer, LT (b. 1842) |
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| vilius kalvaitis (b. 1848) |
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| stasys kalvaitis Lithuanian choirmaster, pianist, and teacher (1890-1976), LT (b. 1890) |
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| brunonas kalvaitis (b. 1902) |
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| vladas kalvaitis Lithuanian writer, LT (b. 1929) |
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| ramūnas kalvaitis Lithuanian university teacher, LT (b. 1961) |
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| romas kalvaitis LT (b. 1955) |
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| girius kalvaitis Lithuanian association football player, LT (b. 1968) |
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| mindaugas e kalvaitis researcher (ORCID 0000-0002-8175-7552) |
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Mr, Lisa, Luke, John, Joan, Jeff, Troy, Tina, Ella, Eric, Erin, Eini, Hans, Hugo, Inga, Outi, Maria, Matas, Sarah, Sheri, Simon, Susan, Gene, Staci, Gail, Dale, Al, Amy, Bob, Ray, Ron, Lee, Tim, Ian, Mary, Mike, Saul, Alex, Bill, Kent, Kiri, Kyle, Paul, Rosa, Rell, Rick, Dana, Gary, and Scott