ଅର୍ଥ : 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).

ଅର୍ଥ : English physiologist who conducted research into the function of neurons. 1st baron of Cambridge (1889-1997).