John. 1921–2016, US astronaut and politician. The first American to orbit the earth (Feb, 1962), he later became a senator (1975–99) and in 1998 returned to space at the age of 77
Glenn in American English1
(glɛn) or Glen (glɛn)
noun
a masculine name
Word origin
Celt: see glen
Glenn in American English2
(glɛn)
John (Herschel, Jr.)1921- ; U.S. astronaut & senator: 1st American to orbit the earth (1962)