CAIRA, Cairau, or Caerau, a parish in Cardiff district, Glamorgan; on the Julian way and the South Wales railway, near St. Fagans station, 3½ miles W of Cardiff. Post Town, St. Fagans, under Cardiff. Acres, 746. Real property, £901. Pop., 131. Houses, 26. The property is divided among a few. An ancient camp of about 12 acres is here, and seems to have been British, though often regarded as Roman. The living is a vicarage in the diocese of Llandaff. Value, £60. Patron, the Bishop of Llandaff. The church stands within the camp, and is good.

(John Marius Wilson, Imperial Gazetteer of England and Wales (1870-72))