timppu: Little off-topic, but Linus Torvalds doesn't sound anything like a Finnish name even though the bloke is from Finland. He is apparently from a Finn-Swedish family (a family living in Finland whose mother language is Swedish, which is the second official language in Finland). Frankly, to me Linus sounds quite special even for a Swedish name, but maybe some Swede could tell if it is a common name in Sweden. I thought all Swedes are called Olle, Palle, and Gustav.
ANYWAY. what I was getting at is that we can be all glad Linus was from a Swedish-speaking family. If he had been from a Finnish-speaking family, his name might have been e.g. Jarmo or Petteri or Miihkali. Would you really want to use an OS which was called e.g. "Jarmox Mint", instead of "Linux Mint"? Linux sounds kinda cool, while Jarmox sounds like ass.
Names like Olle, Palle, Kalle/Calle, Ville, Micke (notice how they all follow a similar pattern? that's due to how well the sound of that pattern of two short-vowel syllables with a single consonant sound between them fits in our language) are originally nicknames formed from Olof/Olov, Paul/Pål, Karl/Carl, William, and Mikael/Michael, but have later become their own actual names - for the record, I don't off-hand know any female names formed in a similar fashion, maybe Johanna->Hanna, and while Anna and Sanna follows the same pattern, I don't actually know where they come from.
Anyway. Linus is a fairly common name. And no, I don't know of a nickname in that pattern for Linus. One of my closest friends have that name, but he's more commonly called by his family name which more closely follows the pattern (two short-vowel syllables) than "Linus" does (one long-vowel syllable and one short).