This is the best help I could find, Branny-Granny ( ); perhaps some real word-origin experts can add some enlightenment as to whether the -olic meaning is also applicable to other words in the list:
bucolic
1523, from L. bucolicus, from Gk. boukolikos "rustic," from boukolos "herdsman," from bous "cow" + -kolos "tending," related to L. colere "to till (the ground), cultivate, dwell, inhabit" (the root of colony).

From:
Online Etymology Dictionary