This is the 493rd most frequent Icelandic word.
ólafur
"Ólafur" is an Icelandic male given name, derived from Old Norse meaning "ancestor's relic" or "heirloom."
In this sentence, 'Ólafur' serves as the proper noun for an individual's name, functioning as the subject of the sentence.
Ólafur fór í fjallgöngu í gær.
Ólafur went hiking yesterday.
Here, the name 'Ólaf' is used in the accusative case in Icelandic, indicating the direct object being acted upon in the sentence.
Við sáum Ólaf í bíó í síðustu viku.
We saw Ólaf at the cinema last week.
In this instance, 'Ólafs' demonstrates the genitive case of the name Ólafur, suggesting possession or belonging.