From Geo. Robertsons  History of Renfrew Shire (1818) p 330

Orr of RALSTON.—The late William Orr, Esq; of Ralston, was the second son of Robert Orr, manufacturer in Paisley. He went to Ireland in his youth, where, along with his brother, John Orr, Esq of Dublin, he introduced and brought to great perfection the art of printing linens. There, by an assiduous attention to business, and an integrity in his transactions, that procured him unbounded confidence, he acquired a handsome fortune, with which he returned to his native place about the end of the last century. In 1797, he acquired, from the Earl of Glasgow, part of the lands of Ingliston, on which he built one of the most elegant villas in the county. About two years after, when the late Wlliam Macdowall, Esq of Castlesemple, was disposing of the adjacent Barony of Ralston, about a mile and a half east from Paisley, he purchased the greater part of it - and called the whole property there by the name of Ralston. 

He married Margaret, daughter of the late James Kibble, Esq; of Whiteford, [ 24 April 1779 in Paisley ] by whom he had three sons and four daughters. He died in 1812, and was succeeded by his eldest son, Robert Orr Esq; now of Ralston, who married Miss Anne Duffie of Dublin.