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Genealogy of the Ellis family, 1641-1913 (1913)
http://archive.org/details/cu31924029840844

Biographical Sketches of Richard Ellis, the First Settler of Ashfield, Massachusetts and His Descendants; Ellis, E. R.; 1888.
(Same book, multiple uploads, you choose!)
http://archive.org/details/biographicalske00elligoog
http://archive.org/details/biographicalsket1888elli
http://archive.org/details/biographicalsket00elliiala
http://archive.org/details/biographicalsket00elli

Descendants of Rowland Ellis and Sallie Abrams of Massachusetts, Frank Rogers Ellis, 1893.
http://search.ancestry.com/search/db.aspx?dbid=17844

Millwood, a family tree; a partial history of the descendants of John Ellis of Rehoboth, Mass., Ellis, Francis O., 1909.
http://archive.org/details/millwoodfamilytr00elli

Notices of the Ellises of England, Scotland and Ireland, from the Conquest to the Present Time, Ellis, William Smith, 1857.
http://archive.org/details/noticesofellises00elli
http://archive.org/details/noticesofellises2nd00elli (2nd ed.?)

The Ellis Family, Foos, Mrs. Katharine, 1900.
http://archive.org/details/ellisfamily00foos
http://archive.org/details/cu31924029840976

Early New England People: Some Account of the Ellis, Permberton, Willard, Prescott, Titcomb, Sewall and Longfellow, and Allied Families. Titcomb, Sarah E. 1882.
http://books.google.com/books/about/Early_New_England_people...