This parish takes its name from its tutelar saint St. Sennan, or
Sinninus, an Irish Abbat, who (saith Leland) was at Rome with St.
Patrick, and came over from Ireland to Cornwall with St. Breage. The
church hath dedicated the 30th of June to his memory. It is a daughter
church to St. Burien, and is valued, together with that and St. Levan,
in the King’s Book, at £48. 12_s._
[The passage alluded to above as in Leland, is this, and in Itin. III.
15, “Breaca,” he says, out of a Life of St. Breage which he met with
in Cornwall, “venit in Cornubiam, comitata multis Sanctis; inter quos
fuerunt Sinninus Abbas, qui Romæ cum Patritio fuit.”]