I am not related to the Peaks or researching them but did a lookup for you.

From the book, "Index to Wilson Co. TN WILLS, 1802-1861", the following Peaks had records in Probate in the year noted:

Zechariah S. Peak - 1835
Evaline Peak - 1835
John Peak - 1846
Sarah Peak - 1847

From the book, “Marriages of Wilson Co. TN, 1802-1850”, by Edythe Rucker Whitley
(note – spelling of names are as they appear in the book)

1. Jinsey W. Peak married Mathew East June 4, 1811 with Aaron Sherron as BM
2. Sally Peak married James Cawthon Sept 29, 1812 with John Cawthon as BM
3. William Peak married Ruth Jones Feb 18, 1821 with Sion Duke as BM
4. Polly Peak was married to Malekyah Zachary Aug 30, 1826 by Rev. Wm. White, with John Peak as BM Aug 28, 1826
5. Joshua Peak was the Bondsman for the marriage of Alfred Dukes to Nancy Bradshaw January 9, 1828
6. Delila R. Peak was married to Stokes Zachary July 16, 1828 by Rev. Wm. H. White, with A. Zachary as BM
7. Joshua Peak married Elizabeth Kemp Nov 4, 1829 with John Duke as BM
8. Zachariah P. Peak was married to Evaline Dukes May 9, 1832 by Rev Wm. Whitten with Isaac Peak as BM
9. Evaline Peak was married to William A. Russell Oct 29, 1837 with Meeds P. Anderson as BM
10. John Peak was married to Sarah Dukes Aug 31, 1841 by Rev. William H. White