Igor
[ˈiɡər]Meaning
Russian form of the Old Norse name Yngvarr, from Yngvi (a god) and herr (army)
Background Story
Igor is the Russian form of the Old Norse name Yngvarr, which the Varangians brought with them when they began settling in Eastern Europe in the 9th century. It is used in Belarusian, Danish, Icelandic, Latvian, Norwegian, Swedish and Ukrainian, and is a doublet of Ivor, Ihar and Ihor. In English the word also denotes the hunchbacked lab assistant in the 1931 film Frankenstein, named Fritz, and the later Ygor, conflated in popular culture as Igor.

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Ilja
Alternate transcription of Russian Илья and Belarusian Ілья, cognate to Ilya (Elijah)
Ilko
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Iolo
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Ivon
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Rino
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Sven
From Old Norse Sveinn, meaning "boy"
Yury
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Aivo
Estonian masculine given name, equivalent of Old Scandinavian Ivar
Alvaro
Spanish, Galician and Portuguese form of a Germanic Visigothic name