- male, deceased (1943)
- Jens Otto Harry Jespersen or Otto Jespersen (July 16, 1860-April 30, 1943) was a Danish linguist who specialized in the grammar of the English...
- male
- Marquis Louis de Beaufront was a major influence in the development of Ido, an international auxiliary language. Beaufront was initially an...
- male, deceased (1984)
- Richard "Ric" Berger (1894-1984) was a Swiss professor of design, decoration, and art history. In 1912, at the age of 18, he became interested in...
- male
- Engelbert Pigal (1899 - 1978) was an Austrian engineer. A speaker of Interlingua and two other auxiliary languages, he wrote two cosmological...
- male
- Ido Gideon is an Israeli Film and TV producer, and also a political figure. In March 2005 he co-founded "Avriri Productions" and produced several...
- male, deceased (1935)
- "'"' (1859-1935) was a journalist, writer, poet, and liberal activist. He was involved in, which appears to have forced him into a nomadic...
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