Does the name Iberia from the Iberian Peninsula has any relation with an old Caucasian called Kingdom of Iberia, or vice-versa?

by Luqueasaur

Which territory had "Iberia" adopted as its naming first, the Caucasian Kingdom or the Peninsula? Also, did people contemporaneous to both designations - the kingdom and the peninsula - get confused frequently about which was being referred to, in, say, a conversation?

Searocksandtrees