Dylan is a name of Welsh origin. In Welsh mythology, Dylan is the name of a legendary sea-god. Literally, it means "son of the waves." According to legend, when the sea-god Dylan died, all the waves of Britain and Ireland wept at his passing. Dylan rocketed to popularity in the U.S. as a result of the prominence of singer Bob Dylan. In fact, the name entered the Top 1000 names list in 1966, a pivotal year for the singer. Bob Dylan, whose real name was Robert Zimmerman, adopted his name in honor of Welsh poet Dylan Thomas. It is primarily a boy's name, but became increasing popular with girls around the turn of the 21st century.