Last name Eysteinsson (Eysteinsson 
) , around the world, is a rare family name. The surname Eysteinsson is habitual in Iceland, where it is quite a common surname, and the United States, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Eysteinsson | Iceland, United States |
| eystein eysteinsson (b. 800) |
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| rǫgnvaldr eysteinsson 9th century Norse viking and first Jarl of Møre (b. 840) |
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| dala-alf eysteinsson IS (b. 905) |
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| helgi eysteinsson association football player (b. 1925) |
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svavar pétur eysteinsson Icelandic singer, IS |
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| ástráður eysteinsson icelandic philologist, IS (b. 1957) |
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| sigtryg eysteinsson Norwegian petty king |
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| hjálmar eysteinsson researcher |
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| thor eysteinsson researcher |
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| björn eysteinsson |
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| yngvi þórir eysteinsson IS (b. 1987) |
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