User blog comment:B214/Question and Answers 6/@comment-90.202.240.151-20161015193457/@comment-1359322-20161016001852

The moment it didn't come from the author means it is speculation already.

Previously someone wrote that Rias is taken from some chess game Rias/Lias thing only for the author to reveal later that Rias is taken from Gaburias (Japanese name for Garchomp)

Also this here: "Zen is the Japanese attempt at pronouncing the Chinese word 'Chan', which in turn is the Chinese attempt at pronouncing the Sanskrit word 'Dhyana', which translates as 'meditation'."

It's "Jian" not "Chan" and the kanji for the Dhyana word is 禪, the kanji for Zen's name is 漸. They're different words with different meaning.