According to Patton, this street takes its name from Prince Frederick, Duke of York and Albany (Frederick Augustus; 16 August 1763 – 5 January 1827) the second son of George III “1810 – The present Lancasterian School, erected in Frederick Street, is calculated for the daily reception of 700 scholars, 500 to be males, and 200 females, the number at present attending, 680.” Belfast Street Directory 1819. “The Lancasterian School, in Frederick Street, was founded in 1811, for the instruction of the labouring classes.” 1852 Belfast / Ulster Street Directory “BELFAST ROYAL HOSPITAL Frederick Street. Opened in 1817, and supported by voluntary contributions”. 1880 Belfast / Ulster Street Directory.