Heinrich Ernst Karl Jordan was a German-British entomologist. He took a special interest in the taxonomy and classification of butterflies, beetles and fleas. Jordan was a founder of the International Congress of Entomology.

Lionel Walter Rothschild, 2nd Baron Rothschild, Baron de Rothschild, was a British banker, politician, zoologist and soldier, who was a member of the Rothschild family. As a Zionist leader, he was presented with the Balfour Declaration, which pledged British support for a Jewish national home in Palestine. Rothschild was the president of the Board of Deputies of British Jews from 1925 to 1926.