Ref; Brown, Asa W.. "Early Settlers of Salisbury, Mass., Arranged intoFamilies", The New England Historical and Genealogical Register volumeVIII (1854).
Ref; Nelson, Glade Ian. "Anthony Colby's Purported Ancestry", TheAmerican Genealogist volume LI (1975).
Isaac Colby was born on 6 July 1640 at Salisbury, Essex County,Massachusetts, Brown gives his recorded birth as (5) 1640.
He was the son of Anthony Colby and Susanna (?).
Isaac married Martha Parrat, daughter of Francis Parrat and ElizabethNorthend.
Isaac Colby died in 1684 at Amesbury, Essex County, Massachusetts, at age43 years.