I like Cedar James Glenn of all your suggestions - for some reason Cedar Bond is giving me imagery of a type of glue for wood (ie a bonding agent).
Then yes CJ, Dara/Darry (legit Irish name) or Cy…
For Cy (my fave), you could think about having a Y in the middle name - eg Cedar Byron Glenn (a nod to Bond as well) or Cedar Rory Glenn etc. Obv you don’t need a Y to use Cy and you may wish to keep CJ as an option, but just a thought. I also like the flow of the two syllable first middle.