- Hadrian, Publius Aelius Hadrianus, Adrian - Roman Emperor who was the adoptive son of Trajan; travelled throughout his empire to strengthen its frontiers and encourage learning and architecture; on a visit to Britain in 122 he ordered the construction of Hadrian's Wall (76-138)
--1 is a kind of Roman Emperor, Emperor of Rome
- Adrian, Edgar Douglas Adrian, Baron Adrian - English physiologist who conducted research into the function of neurons; 1st Baron of Cambridge (1889-1997)
--2 is a kind of physiologist