I just received a note from a (likely) cousin who traces her ancestry to the seventh son of Captain John Whipple. In looking at my database, I realized that there are currently 11 entries for Whipples named John with title of Captain. Here they are:

1. Captain John Whipple, b. abt 1617 in England, d. 16 Jan 1685 in Providence, RI; m. Sarah in 1638.
2. Captain John Whipple, b. 21 Dec 1625 in Bocking, Essex Co., England; d. 10 Aug 1683 in Ipswich, Essex Co., MA; m. (1) Martha Reyner, (2) Elizabeth Cogswell. (This Captain John built the original John Whipple house in Ipswich. (See its page on the Ipswich Museum web site.)
3. Captain John Whipple, b. 30 Mar 1660 in Ipswich, Essex Co., MA; d. 11 Jun 1722 in Ipswich; m. (1) Hannah Rolfe, (2) Joanna Tuttle.
4. Captain John Whipple, b. 18 May 1685 in Providence, RI; d. 18 May 1769 in Providence; m. Abigail Brown.
5. Captain John Whipple, b. 22 Jul 1689 in Ipswich, Essex Co., MA; d. 9 Feb 1781 in Ipswich; m. his 3rd cousin Hannah Whipple 7 Jun 1714.
6. Captain John Whipple, b. 6 Dec 1695 in Ipswich, Essex Co., MA; d. 16 Jan 1769 in Ipswich; m. Martha Baker 14 May 1735 in Ipswich.
7. Captain John Whipple, b. 25 Jun 1717 in Ipswich, Essex Co., MA; d. 27 Dec 1794 in Ipswich; m. Dorothy Moulton.
8. Captain John Whipple of Providence, RI, married in RI to Anne or Anna Whipple in 1757.
9. Captain John Whipple, b. 1776 in Danvers, Essex Co., MA; d. 1857 in Philadelphia, PA.
10. Captain John Whipple, b. 1 Apr 1828 in Adams, Jefferson Co., NY; d. 21 Mar 1879 in Fordham, NY.
11. Captain John Nicholas Whipple, b. 20th century.

(Let me know if any of the links are broken, or if you find typos in the dates.)