Gloucestershire places with etymologically Brittonic names

Gloucester ( ) is a cathedral city, non-metropolitan district and the county town of Gloucestershire in the South West of England. Gloucester lies on the River Severn, between the Cotswolds to the east and the Forest of Dean to the west; it is sited 7 miles (12 km) from Cheltenham, from Monmouth, from Bristol, and east of the border with Wales. Gloucester has a population of around 132,000, including suburban areas. It is a port, linked via the Gloucester and Sharpness Canal to the Severn Estuary.

Cirencester ( , ) is a market town and civil parish in the Cotswold District of Gloucestershire, England. It lies on the River Churn, a tributary of the Thames. Cirencester is the eighth largest settlement in Gloucestershire and the largest town within the Cotswolds. It is the home of the Royal Agricultural University, the oldest agricultural college in the English-speaking world, founded in 1840. The town had a population of 20,229 in 2021. The town is north-west of Swindon, south-east of Gloucester, west of Oxford and north-east of Bristol.

Chaceley or Chaseley is a village and civil parish north of Gloucester, in the Tewkesbury district, in the county of Gloucestershire, England. In 2011 the parish had a population of 125. The parish touches Deerhurst, Eldersfield, Forthampton, Tewkesbury and Tirley.