"Mr. J. Brown moved the adoption of this report, which, in addition to the usual statement of ordinary accounts, contained the following:- .. and the new street on the Falls Road, near the convent, "Cavendish Street.” (Northern Whig - Saturday 02 September 1882).
It is highly likely that the Cavendish streets were named after Lord Frederick Cavendish who was assassinated on 6 May 1882 a few hours after he arrived in Ireland to take up his post as Chief Secretary for Ireland.