Furthermore, amongst the myriad of places in the land that gave these Isles its tradition of monasticism (embraced by the Irish under the Welshman, St Patrick and carried from there to the non-Welsh parts of Scotland and Northern England)), you will see many that begin "Llanfair..."
The prefix Llanfair means the place, the village, the Church there was dedicated to Our Lady, the Blessed Virgin Mary. The Welsh, the descendants of the original Britons who embraced the Catholic Faith as Romano-Britons, were dedicated to the Virgin Mary, just as the English Saxons and the Norman-English would be in later years.
Following the Reformation sadly after many years the Welsh (with few brave exceptions) lost their ancient Faith, and with the protestant Bible published in Welsh and Welsh nonconformist chapels opened, to save their language and keep their communities alive, most Welshmen became nonconformist (no doubt their love of Biblical and Welsh hymns playing a part).
Yet our Welsh Catholic past is all around us, in the names of the Saints and the Blessed Virgin Mary in the very towns and villages throughout Wales, North, East, South and West.
Please pray for the conversion of the Welsh to their Catholic Faith.
BBC Site on Llan Names in Wales