Cognomen Sluga (Sluga 
, Слуга 
) , all around the world, is quite a rare family name. The cognomen Sluga is characteristic of Slovenia, where it is quite a common surname, Croatia, where it is quite a rare surname, and Sierra Leone. Not in comparison with a country's population, it most frequently occurs in Slovenia, the United States, and Germany. Much less frequently, Sluga is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Sluga | Germany, Italy, Slovenia, United States, Poland |
| Слуга | Ukraine |
| avguštin sluga SI (b. 1753) |
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ludvik sluga SI (b. 1917) |
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| franc sluga SI (b. 1909) |
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janja sluga Slovenian politician, SI (b. 1974) |
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| hans sluga German logician, US (b. 1939) |
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| elfriede sluga (b. 1930) |
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simon sluga Croatian association football player, HR (b. 1993) |
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katja sluga Slovene writer, SI (b. 1995) |
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| miloš sluga Yugoslav and Slovenian ice hockey player, SI (b. 1949) |
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| franci sluga SI (b. 1948) |
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| glenda sluga Australian historian, AU (b. 1962) |
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| dejan sluga SI (b. 1965) |
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| romina sluga researcher (ORCID 0000-0001-8372-3033) |
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| brandon sluga college basketball player (1997–2000) Utah |
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| alojzij sluga researcher, SI |
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