The origination of Mettey and all the other variations listed above are derived from the Latin name of Meta. The first ancient French variant of Meta was Mette with all other variations appearing in later generations. Variations originated due to family feuds, illiteracy, changes in religion, geopolitical changes, adapting to regional variants, government clerk language and spelling errors, just to name a few reasons. Bill Mettey indicated that a branch of his family in Canada used either Metthe or Mettier.

Frederick Mettey enlisted in 1862 at Camp Dennison in Ohio and served in the 108th Regiment, Ohio Infantry. The 108th Regiment fought in the following Battles: Hartsville, Chattanooga-Ringgold, Dalton, Atlanta, Rocky Faced Ridge, Resaca, Dallas, New Hope Church, Kenesaw, Taylor's Hole Creek, and Bentonville. The estimated losses on both side during these Battles was 45,095 men.The 108th Regiment served under the following leaders: Col. Absalom B. Moore, Maj. Gen. Ulysses S. Grant, Maj.Gen. George H. Thomas, Maj.Gen. William T. Sherman, Maj. Gen. Oliver Otis Howard,  and Maj.Gen. Henry Slocum. The Confederate Commanders they faced were:Brig.Gen. John Hunt Morgan, Gen. Braxton Bragg, Gen. Joseph E. Johnson, Gen. John Bell Hood, Maj. Gen. Patrick R. Cleburne, and Lt.Gen. William Hardee. Frederick Mettey was discharged in 1865 and I believe he settled in Indiana as there was a Fred Mettey born there in 1869.