Senny, a hamlet in Devynnock parish, Breconshire; on a rivulet of its own name, 8 miles SW by W of Brecon. It has a post-office, of the name Senny-Bridge, under Brecon. Real property, £1,878. Pop., 244. Houses, 50.
Source: The Imperial Gazetteer of England & Wales [Wilson, John M]. A. Fullarton & Co. N. d. c. [1870-72].