I recently was searching through an index on some microfilm entitled "Early Marriages of Clinton County, Ohio 1810-1864" (FHL Film #317345 Items 1-2). The index was created by The Daughters of the American Revolution in the 1930's. Here are some Atha/Athey marriages I found.

Atha, Susanne m. Jacob Garrison, October 10, 1811
Atha, Elizabeth m. William Smith, February 13, 1814
Atha, Rebecca m. Elijah Teague, December 26, 1817
Atha, Nancy m. William Wilkerson, November 12, 1818
Atha, Thomas m. Malinda Clevinger, January 25, 1821

Athey, Hezekiah m. Nancy Biggs, March 5, 1829
Athey, George W. m. Charlotte Biggs, June 23, 1841
Athey, Hezekiah m. Mary Ann Smith, October 11, 1845
Athey, Sarah Jane m. John Pennington, March 8, 1853
Athey, James M. m. Nancy M. Clevenger, September 13, 1853
Athey, Rosanna m. Edward Crab, March 30, 1854
Athey, Susannah m. Jacob Mourer, December 23, 1854
Athey, Elizabeth m. Henry C. Athey, December 28, 1854
Athey, Andrew J. m. Jane Batson, November 5, 1855
Athey, Rhoda A. m. Peter Tomlin, September 16, 1858

I have some others but no dates yet for them. I will post more next week.