Inchaffray Abbey was situated by the village of Madderty, midway between Perth and Crieff in Strathearn, Scotland. The only traces now visible are an earth mound and some walls on rising ground which once (before drainage) formed an island where the abbey once stood (the surrounding marshes known for eels).
Folk etymology has the name Inchaffray taken from the Gaelic innis abh reidh (island of the smooth water), but the earliest attested form of the name is the Latin Insula missarum (island of the masses), mass in Gaelic being oifrend and Welsh offeren, thus island of the offerings. A charter of Jonathan, Bishop of Dunblane, refers to the place "qui uocatur lingua Scottica Inche Affren" (="which is called in the Gaelic language Inche Affren") and comparative usage shows that Insula Missarum was taken as a translation, e.g. "Sancti Johannis evangeliste de Inchefrren" and "sancto Johanni apostolo de Insula Misserum".
A priory was created on an existing Culdee site by Gilbert, Earl of Strathearn and his first known wife Maud d'Aubigny in around 1200. Dedicated to their memory of their first-born son Gilchrist, to the Virgin Mary, and to John the Evangelist, the abbey was granted to the Augustinians of Scone Abbey. The charter survives, and also names the churches of Saint Cathan of Abruthven, Saint Ethernan of Madderty, Saint Patrick of Strogeith, Saint Makkessog of Auchterarder, and Saint Bean of Kinkell. The details of the earlier establishments are not certain, but a church dedicated to John the Evangelist is attested in about 1190. Gille Brigte's new priory became an abbey in about 1220.