Some articles on chayun:

Tzvi Ashkenazi - Amsterdam - The Chayun Incident
... On June 30, 1713, Nehemiah Chiya Chayun arrived at Amsterdam and requested permission of the Portuguese congregation to circulate his writings, which had ... Ashkenazi thought Chayun was an old enemy of his from Sarajevo and Salonica, and at once requested Solomon Ayllon, Chacham of the Portuguese congregation, not to ... Chayun thereupon called on Ashkenazi personally and made an explanation whereupon the rabbi retracted his accusation, stating that it was a case of mistaken identity ...