Historical clue formulations

• Nickname in 1950s-'60s TV — 2022-05-28
• 1950s-'60s sitcom nickname — 2020-06-25
• Wally's sitcom brother, with "the" — 2019-12-13
• Wally's bro, on '50s-'60s TV — 2016-07-03
• Wally's kid bro, in 1950s-'60s TV — 2015-12-14
• Sitcom nickname of Wally's bro — 2015-07-16
• '50s-'60s sitcom nickname — 2013-12-27
• Wally's bro — 2011-06-18
• Wally's little bro — 2008-09-09
• Wally's TV brother, with "the" — 2008-01-27
• Wally's sitcom bro — 2005-06-29
• 50's-60's sitcom boy — 2002-05-05
• Wally's little bro — 1995-03-01