Hi Joan,
The Townshend side is hard to trace. I only know what Grandma told me and some research on our Great, Great Grandfather Joseph Wiley Townshend. Grandma, Uncle Dick and Uncle Ivan were the only St.Andre children that had slight memories of him mostly from his funeral at the lighthouse, the one he "haunts". Grandma said Aunt Bess told her Joseph was a descendent of the Marquis of Townshend, although which one I don't know, but below are some possibilities. Hope it points you in the right direction.
Take care,
Rick
Capt. Lord JAMES TOWNSHEND
1785-1842Born 11th of September 1785 - Died 28th of July 1842Full name: JAMES NUGENT BOYLE BERNADO TOWNSHEND Youngest son of George, the first Marquis Townshend, by his second lady, Anne, daughter of Sir William Montgomery, Bart. [This is in conflict with the biography of the 1st Marquess that says Anne was rather the daughter of Sir James William Montgomery]

"Lord Sydney"
THOMAS TOWNSHEND, 1733-1800 who has the cleft chin that runs through some of the St.Andre family

TOWNSHEND, GEORGE, 4th Viscount and 1st Marquess TOWNSHEND, an army officer and artist; b.28 Feb. 1723/24; d. 14 Sept.1807 at Raynham Hall, Norfolk, England1773 he married Anne, daughter of Sir James William Montgomery and sister of William*; this marriage is said to have produced six children. Townshend was one of the favoured people who in July 1767 received 20,000-acre grants in St John's (Prince Edward) Island, being awarded Lot 56 in the east end of the Island. In 1770, embarrassed by his Irish expenses, he was trying unsuccessfully to sell this land [His youngest son, Captain Lord James Townshend eventually inherited this property] . Like so many of the absentee proprieters, he seems to have done nothing to settle or develop his grant.