John Frowyk became Prior of the Hospitallers in Ireland in 1356 and in the same year became Lord Chancellor of Ireland

Lord Chancellor of Ireland

The office of Lord Chancellor of Ireland was the highest judicial office in Ireland until the establishment of the Irish Free State in 1922. From 1721 to 1801 it was also the highest political office of the Irish Parliament.-13th century:...

; he served as Chancellor until 1371, but O'Flanagan states that no further details of his life are recorded.

It is possible that he belonged to the de Frowyk family of Old Ford, Middlesex

Middlesex

Middlesex is one of the historic counties of England and the second smallest by area. The low-lying county contained the wealthy and politically independent City of London on its southern boundary and was dominated by it from a very early time...

, 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.