Leon, known to listeners as Etymoleon, has long held a fascination with the origins of words. Through dedicated self-study, he has developed a growing expertise in the field of etymology.

This pursuit led to the creation of Word History, a weekly fifteen-minute podcast devoted to the exploration of word origins. Each episode traces the etymology of a particular word or name, while also drawing upon stories and events from the past to provide historical context.

Building on this foundation, Leon later developed Derivety, a daily word game in which players test their knowledge of etymology by identifying a hidden word, guided by its origin and a carefully crafted clue, all under the pressure of a ticking clock.

The name Etymoleon is a fusion of "etymology" and Leon’s own name.