Jaromir (YAH-rom-eer / YAR-oh-meer) is a masculine Slavic name meaning "fierce peace" and "spring peace." It is fairly common in Czechoslovakia and other European countries, but not in the U.S. In 1998 we saw the only usage, given to 6 boys. It's also a Polish name, where the meaning is "good reputation."
Jaromir, Duke of Bohemia proclaimed himself Bohemian Duke of Prague in 1004. Jaromir, Bishop of Prague was an ally of Holy Roman Emperor Henry VI and lived to a decently old age, dying in 1090. In modern times there are a handful of slightly famous namesakes, mostly Czech. In the Czech Republic it currently ranks #79.