According to
www.kyrie.com and years of Catholic school, Kyrie is a Greek word for Lord prn kee-ree-ay. Kyrie elasion is a phrase often used in Catholic texts to mean "Lord have mercy."
Kyrie is very unlikely to be
German as the letter Y only occurs in modern
German in loan words from other languages.
That's the short answer. Someone more knowledgeable than me could provide better and more thorough information.