Shortly after formation, the Anglo-Norman invasion impacted the whole Dublin region, and Raheny changed hands more than once in the following years, though it is not always clear what effect such changes had on the Church locally. In 1171, a Dane called Gill Mololmoa (Gilcolm) was a landholder in the area, and around this time, part of Raheny (Rathenny) was taken from Gilcolm and granted by Strongbow to the Norman knight John deCourcey, a descendant of whose, of the same name, was "Lord of Rathenny and Kilbarrock" at the beginning of the 13th century. By 1225, much of Raheny still belonged to Christ Church, but some appears to have been in the hands of St. Mary's Abbey, who acquired Christ Church's part in a swap; these holdings are confirmed in a Papal Bull (Pope Clement III) of 1189, and a renewed grant by King John, which specifically mentions a church building. There are further references in abbey records of 1296 and 1310, and the church, along with those of Grange (Baldoyle) and Coolock, is mentioned in a will of 1472.