In its early days the Celtic Church spread by the setting up of a ceall, a cell (in its dative form 'cill,' pronounced 'kil') This prefix kil appears in many place names throughout Scotland It appears mostly as a prefix together with the name of a saint, e g Kilmun, the cell of St Mun; Kilbride, the cell of St Bridget The meaning of kil came to be extended to include a church and a burial ground However, the Gaelic word for a wood is coille, often corrupted to 'kil' and 'killie' e g Killiecrankie