Historical clue formulations

• Like the Kardashians, ethnically — 2019-05-26
• Neighbor of an Azerbaijani — 2009-03-09
• Member of the first state to adopt Christianity as its religion — 2009-01-10
• Georgian's neighbor — 2008-10-29
• Georgian's neighbor — 2006-04-22
• Azerbaijani's neighbor — 1999-08-03