Speleologists

Romanian polar explorer (1868–1947)

Czech archeologist, geographer, paleontologist, professor, speleologist, university educator and zoologist (1877-1960)

German scientist

Romanian writer and scholar

Austro-Hungarian businessman and naturalist (1791–1878)

Hungarian mining engineer (1846–1924)

Portuguese biologist, speleologist

Slovenian cave photographer, speleologist, and botanist (1934-2014)

South African speleologist, geographer and environmentalist

French speleologist (1835–1922)

Russian speleologist

Hungarian geographer (born 1945)

Slovenian linguist

German cave diver

Ukrainian speleologist (born 1971)