The late Barbara Ellen Tucker Harrell (Mrs. John Kenneth Harrell) wrote a book which tells of her (and my) Leak ancestors:
"The McAfee Family, et al.: A Family History, and the related families of: Anderson, Beuford, Casey, Coats, Green, Langston, Leak, McVay, Martin, Neill, Roe, Tucker, Walker, Watson, West, Wilkie, Wright" by Barbara Ellen Tucker Harrell, Bandera Printing Company, Bandera, Texas 78003, 1983.
Ms. Harrell was at times a national officer of the DAR.
Another group of Leaks, perhaps related to these, perhaps not, is described in the book KINFOLKS by Harllee and in the book Old Halls, Manors and Families of Derbyshire, Vol. III: The Scarsdale Hundred by "J.T." The Leak family held the estate of Sutton in Scarsdale for 333 years.
Maybe you already know these things.