Erm, what's with the change? If anything, this has gone from a bad joke for adolescents to quite an unrelated name. If you change the tome, change the item.
If you have an issue with using the word tentacle, change the item model, name, etc and the tome name change logically changes as well.
If you have an issue with using the word tentacle, change the item model, name, etc and the tome name change logically changes as well.