For the past 5 year's, I've been tracing the Lounsbury line for my wife Sue Lounsbury and our children. Here's what I've found...
JOHN LOUNSBURY (b.1674, Rye,NY) married ANNE GUION (b.1678) of New Rochelle, New York. John's FATHER is RICHARD LOUNSBURY (b. 1634 East Riding, Yorkshire,England). Richard Lounsbury's wife is ELIZABETH PENNOYRE (or Pennoyer) (b. 1652) Richard's father is RICHARD LOWNSBOROUGH (b.???-died 1650) from Yorkshire, England.
The SAMUEL LOUNSBURY you've listed must then be the brother of MICHAEL LOUNSBURY. The G,g,g,g,great Grandfather of my wife Sue.
Also of note: John Lounsbury is the first of your line to be born in America.