Historical clue formulations

• Tolkien creature — 2019-01-01
• Fictional figure whose name means "hole dweller" — 2018-09-07
• Meriadoc the Magnificent, for one — 2012-12-12
• Shire dweller — 2006-09-14
• Challenger of the dragon Smaug — 1997-06-22
• Middle Earth inhabitant — 1995-04-03