'Cunrad Ryeff [son of Jacob and Anna (Buman) Ryeff], b. 27 Jan 1603 [at Wädenswil]. He married Elsbeth Treickler. She was a witness to the baptism of Hans Heinrich, son of Jacob Ryeff in 1622. His children were baptized at Wädenswil.'
27 Jan 1603 is his baptism date, as indicated in an email from Richard Davis.