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'Oswald Ryeff [son of Jacob and Anna (Buman) Ryeff], b. 28 Nov 1604 [at Wädenswil].'
28 Nov 1604 is his baptism date, as indicated in an email from Richard Davis.
'Oswald Rÿff [son of Jacob Rÿff and Anna Buman] bapt. Nov. 28, 1604, Wädenswil, Zurich, Switzerland.'