Roger Filcock, SJ (alias Arthur Naylor)[1] (died 27 February 1601, London) was an English Jesuit priest.

Filcock however, was captured but managed to escape and landed on the Kent shore of England in early 1598 where he assumed the alias of Arthur and began his priestly ministry.

While waiting to go to Flanders for his novitiate, Filcock was apprehended, betrayed by a former fellow student at Valladolid and sent to Newgate prison in London.

[3] During his time as a missioner he had known Anne Line, a convert to the Catholic faith and widow whose husband had died in exile after being caught attending Mass.

[4] The most reliable compact source is Godfrey Anstruther's Seminary Priests, St Edmund's College, Ware, vol.