Zeno, the name of two ancient philosophers, has a muscular dynamism that's lightened by its cheerful final vowel, resulting in a kind of offbeat sci-fi feel. Zeno of Citium was the founder of the Stoic school of thought, Zeno of Elea was another early, original Greek thinker, famed for his Paradoxes.

This name feels warmer and more human-appropriate in its longer version, but still retains that breezy feel. Trivia tidbit: Zephyrinus was a Jewish pope.

Zelmo Beaty was a noted basketball player in the 1960s and 1970s; his name has an offbeat tickle-me-Zelmo feel.