"Jacie" appears to be a modern development, possibly a name formed from the initials "J.C.", which could stand for a variety of things from "Jesus Christ" to "Junior Citizen".
Besides being a genus of insect, "Andrena" is also a variation on the name of "Andrea".
Any other meaning for "Duncan" might be construed from the character in Shakespeare's play *MacBeth*. I suppose one could say the name means "king" in that respect -- although that isn't the literal meaning of the name.
-- Nanaea