Too utterly utter?
Love the nn Zeb as does DH and he rather unexpectedly said that he had fallen for Zebedee last night (having initially vetoed a couple of months ago). He's not keen on Zebediah which I guess would be the most 'sensible' alternative.
We already have a DS with a name that's not particularly unusual but hardly encountered on a daily basis. We think it would go well with Zebedee/Zeb so that's not a consideration...