McELROY: Scotch-Irish McElroys in America, a.d. 1717 - a.d. 1900. 1901By John M. McElroy Scotch Irish McElroys in America, a. d. 1717 a. d. 1900. This book tells the story of the McElroy family, who were part of the Scotch Irish immigrant community that settled in America, in various locations. They came to Bucks County, Penna, and elsewhere, in the early 18th century. We see William McElroy and his wife Jean, with a land grant in Doylestown, Penna. This book explores the McElroy origin, the significance of the name,