Hiro is an apt name for a hero of the show Heroes -- and for our times. Widely used in Japan, sometimes also for girls. Hiroshi is a long form.

Nikola is generally masculine in Serbia, Croatia, Bosnia, Montenegro, Bulgaria and Macedonia, while in Germany, Poland, Slovenia, Slovakia, Estonia and the Czech Republic it is usually feminine.

Juno is a boy's name of Latin origin. Traditionally known as the Roman goddess of marriage and childbirth, Juno has crossed gender boundaries to become a distinctive masculine choice. The name carries associations with protection, vitality, and leadership. While relatively uncommon for boys, it has a strong, concise sound with its two syllables ending in a resonant 'o' that feels both classical and contemporary. Juno has gained some visibility through cultural references, including the popular film 'Juno,' though that featured a female protagonist. As parents seek unique names with historical roots, Juno offers boys a name with gravitas and a touch of mythology.

The name of the Greek winged god of love (usually romantic and sexual love) may seem a lot to live up to, but like other deity names, it's on the rise. In a recent year, it was given to more than 130 boys in the US.

The great philosopher's name is commonly used in Greek families, and is one that could work for daring, philosophical American ones. With user friendly nicknames such as Ari, Aris, Artie, and Ris, Aristotle is a ambitious choice, associated with morality, ethics, literature, and psychology.

Alexei could well join the legion of Alex names popular in the US. There are countless opportunities to liven up Alexander, and Alexei (or Alexey) is one of the most straightforward and appealing.