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'Joseph Ryeff [son of Jacob and Anna (Buman) Ryeff], b. 30 Dec 1596 [at Wädenswil].'
30 Dec 1596 is his baptism date, as indicated in an email from Richard Davis.
'Joseph Rÿff [son of Jacob Rÿff and Anna Buman] bapt. Dec. 30, 1596, Wädenswil, Zurich, Switzerland.'