John Frowyk became Prior of the Hospitallers in Ireland in 1356 and in the same year became Lord Chancellor of Ireland; he served as Chancellor until 1359, but O'Flanagan states that no further details of his life are recorded. One record of his tenure as Lord Chancellor survives: letters patent issued by Edward III addressed to Frowick and other Crown officials in December 1357, giving details of an inquiry into alleged misconduct by John de Bolton. former Treasurer of Ireland.
It is possible that he belonged to the de Frowyk family of Old Ford, Middlesex, who were prominent in the London merchant community for several generations. Roger de Frowyk, who built a mansion at Seething Lane around 1303, was a goldsmith and Crown official.
References
John Frowyk Wikipedia(Text) CC BY-SA