1651,William Bradford,The names of those which came over first, in the year 1620, and were (by the blessing of God) the first beginners, and (in a sort) the foundation, of all the plantations, and Colonies, in New England (And their families).:
Francis Eaton, and Sarah his wife, and Samuel their sone, a yong child.
The usage of this term for plurals stems from the similarity or identity of female singular and (gender unspecific) plural declensions in German grammar.
Chyet, Michael L. (2003) “sone”, inKurdish–English Dictionary[2], with selected etymologies by Martin Schwartz, New Haven and London: Yale University Press,page558
