Severus

To everyone who thinks Snape is evil/ doesn't think this is a good name because it's the name of a Harry Potter character:
Severus Snape was a great character. He is often misunderstood and portrayed negatively due to his involvement in the dark arts. He was not bad though, he saved Harry's life on several occasions and this is a great name.

Septimus Severus was Emperor of the Roman Empire from 193-211 and founder of the short-lived Severan Dynasty. He was known for pushing the boundaries of the empire further east, south, and attempting to conquer Scotland but dying before he could. He was also known for his persecution of Christians; he continued the policies set in place by earlier emperors and also made it illegal to convert to Christianity or Judaism. The Arch of Septimus Severus was dedicated in 203 in honor of his victories against the Parthians, and it is one of the surviving structures found in the Roman Forum. Interesting trivia note for Harry Potter lovers: Septimus Severus's name was Lucius Septimus Severus Augustus.

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A second Emperor Severus, Alexander Severus, ruled from 222 to 235 before being killed by his own troops. He was the last emperor of the Severan dynasty.

There were several saints named Severus, especially in the Eastern Orthodox church.

Spoiler warning for those who haven't read the final Harry Potter book: Severus is the middle name of Harry and Ginny's son Albus "Al" Potter.

Of course now the first association would probably be Severus Snape from the "Harry Potter" series. A very conflicted, disputed character. Most Harry Potter fans cannot even decide whether or not he is good or bad - lots of theories and second thoughts on that charcter. Personally I like this name. I think it sounds very balanced, strict and interesting. To me it also reminds of the North, because 'sever' in Russian, and probably some other Slavic languages, means 'the north'.