The derivation of the placenames (English and Welsh) is obscure. The parish was originally a manor attached to St David's and it formed a detached part of the Hundred of Dungleddy. It is close to the Pembrokeshire language frontier and was described as Welsh-speaking by George Owen in 1602, but today it is predominantly English speaking.
In 1934, a detached part of the parish of Lampeter Velfrey was added to Crinow. The pre-1934 parish had an area of 144 Ha. Its census populations were: 53 (1801): 69 (1851): 56 (1901): 32 (1951): 31 (1981).
The percentage of Welsh speakers was 70 (1891): 48 (1931): 20 (1971).
- Charles, B. G., The Placenames of Pembrokeshire, National Library of Wales, Aberystwyth, 1992, ISBN 0-907158-58-7, pp 485