"… at a date subsequent to 1684, [Mary (_____) (Yates) Higgins] married for her third husband and as his second wife the venerable Isaac2 Whitehead, Sr. (b. 1648, New Haven Conn.) [Isaac1 Whitehead] of Elizabethtown, N. J., … son of John1 Whitehead, of New Haven, Conn., …"
There is no known connection between this Isaac Whitehead, who removed from New Haven to Elizabethtown, and the contemporary John1 Whitehead of New Haven.