Riall is a given name and a surname. The surname may derive from Ryal in Northumberland, England. People with that name include:
Lucy Riall (active from 2004), British historian Phineas Riall (1775-1850), British general Tom Riall (born 1960), British businessman Matthew Henry Phineas Riall Sankey (1853-1926), Irish-born engineer and captain in the Royal Engineers Riall Johnson (born 1978), American football player
References
See also Ryall (disambiguation)