John Ryder (c.1697–1775), was the
Church of Ireland Bishop of Down and Connor, 1743–1752, and
Archbishop of Tuam, 1752–1775. He was a noted alumnus
Charterhouse School.
Colloquial usage
"In Glaswegian rhyming slang, the name "John Ryder", is used for "cider" - for example Frosty Jacks.