C. F. (Charles Frederic) Hayes

Born in Blackheath, London, on December 4, 1857, Charles Frederic Hayes became known as an English Esperantist as well as a bookkeeper. He was active during the period when Esperanto was spreading across Europe and Britain through clubs, congresses, and practical teaching materials.

Hayes is best known for his work on the English-Esperanto Dictionary, a reference book that helped learners and readers use the language more confidently. That kind of practical, careful compilation suited the needs of the early Esperanto movement, which depended on dedicated supporters who could turn an ideal into something useful in daily study.

He died on January 9, 1942. Though not a household name today, he remains part of the foundation of Esperanto publishing, remembered for work that supported readers, students, and the wider international community built around the language.