This implies that "Wild Goose Nation" referred an actual place (although that might not have been its official name):

From Joseph H. Wenger, History of the Descendants of J. Conrad Geil and His Son Jacob Geil (Elgin, IL: [author], 1914):

[Re: Jacob Beery (1806-1885) and Catharine Stalter (1803-1890), married 1832.]

"Later they moved to Wyandot Co., Ohio, in what was called 'Wild
Goose Nation.' Brethren in Christ. Nevada, Ohio."

[Brethren in Christ," a Mennonite sect, is evidently the name of the religious denomination they belonged to. Nevada is a village in Wyandot County.]