Sir Robert Lloyd Patterson (1836–1906) was an Irish naturalist and linen merchant.

Patterson was the second son of Robert Patterson F.R.S. In August 1902, he was awarded a knighthood for services to the Belfast Chamber of Commerce.^[1] Robert Lloyd Patterson wrote several zoological papers in the Irish Naturalist and the Report and Proceedings of the Belfast Natural History and Philosophical Society and a book titled The Birds, Fishes and Cetacea of Belfast Lough (1880). On his death Robert Lloyd Patterson bequeathed his art collection to the Belfast Corporation. It is now in the Ulster Museum.

Coat of arms of Robert Lloyd Patterson

Notes Confirmed 30 March 1901 by Sir Arthur Vicars, Ulster King of Arms.[2] Crest On a wreath of the colours a pelican in her piety vulning herself Proper gorged with a collar dancettee Azure. Escutcheon Argent on a fess dancettee Azure thre fleurs de lis of the field on a canton Gules a lion rampant reguardant Or. Motto Murus Aeneus Conscientia Saua

• Foster, J. W. and Chesney, H. C. G (eds.), 1977. Nature in Ireland: A Scientific and Cultural History. Lilliput Press. ISBN 0-7735-1817-7.

• BHL The Birds, Fishes and Cetacea of Belfast Lough 1880
• National Library of Ireland
• Irish Natural History Literature partial bibliography