Kilcock takes its name from the 6th century Saint Coca who founded a church beside the Rye River, a major tributary of the River Liffey. The saint is traditionally said to have been a sister of St. Kevin of Glendalough; by occupation, she was an embroiderer of church vestments, including those for St. Colmcille. A holy well dedicated to Coca, formerly thought to be lost in the back-yards of Kilcock, is believed locally to be in the area behind the Ulster Bank, and her feast is remembered on 6 June. However, this commemoration is a modern revival as when the Ordnance Survey of the area was being made in 1837 it was recorded that "there is no old church in ruins in this parish nor is any patron saint or day remembered... the meaning of the name Cille Choc is not remembered." When the present parish church was dedicated in 1867 it was named for St. Coca, and it had cost £10,000 to build to the design of architect J.J. McCarthy.