Updated: Feb 2, 2019
This Leonard line begins with John Leonard of Springfield, Massachusetts, who was born in England and came to American with two brothers around 1639. He had 13 known children with Sarah Heald (Heath).
Genealogical Record of the Families of Parsons and Leonard, of West Springfield, Massachusetts, by Samuel L. Parsons, Brooklyn, New York, 1867, can be read free of charge at Archive.org. For a hard copy, you can try finding a copy on Amazon.com or ebay.com.
See also Leonards of New England and Beyond.
For more Leonard history, see the Leonard page.