When finishing your slam-bang sonnet up with a couplet that rhymes Josephus with Bocephus, remember you have to add another syllable at the end, as the stress on each is on the middle syllable (JoeSEEfus, BoSEEfus).
Although, to be honest, I probably won’t use this particular tip myself, as I’m not comfortable or natively familiar with the pronunciation of either. I mean, although it’s spelled Joseph-us, apparently it’s not pronounced that way (my beautiful wife and Wikipedia agree), and the only time I’ve heard Bocephus spoken aloud was in the song “Redneck Woman”.
Given that the song is entitled “Redneck Woman”, the pronunciation is suspect.
So it’s back to rhyming “love” with “dove” for me.