John Tyler
— Noun
– English
～ elected vice president and became the 10th President of the United States when Harrison died (1790-1862)
John Tyndall
— Noun
– English
～ British physicist (born in Ireland) remembered for his experiments on the transparency of gases and the absorption of radiant heat by gases and the transmission of sound through the atmosphere; he was the first person to explain why the daylight sky is blue (1820-1893)