What was “Radar” O’Reilly’s real name in the 1970 film and 1972-83 CBS TV series “M*A*S*H*”?

“Radar” O’Reilly’s real name in the 1970 film and 1972-83 CBS TV series “M*A*S*H*” was Walter.

Gary Burghoff played the character in both TV and film.

What was the chimp's name on the TV series "Me and the Chimp" (CBS, 1972)?
What was Hawkeye's real name on "M*A*S*H" (CBS, 1972-83)?
What was the name of Hawkeye Pierce's (Alan Alda's) tent on "M*A*S*H" (CBS, 1972-83)?
Who played the Kravitzes on the TV series "Bewitched" (ABC, 1964-1972)?
What was the time setting of the last episode of "The Waltons" (CBS, 1972-81)?
Who served as the grown-up voice of John-Boy, narrating "The Waltons" (CBS, 1972-81)?

What was “Radar” O’Reilly’s real name in the 1970 film and 1972-83 CBS TV series “MASH”?